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                  <text>C O L O R A D O

P A R K S

&amp;

W I L D L I F E

Official State Watercraft Inspection
and Decontamination (WID)
Protocols and Procedures
Certification WID Training Curriculum for Stage I and Stage II Authorized Agents
Original adopted on February 20, 2009. Revised on March 1, 2020.

cpw.state.co.us

��Colorado Parks and Wildlife
Invasive Species Program
Aquatic Nuisance Species (ANS)
6060 Broadway, Denver, CO 80216
Program Office: 303-291-7295
Invasive.Species@state.co.us
Elizabeth Brown
Invasive Species Program Manager
Elizabeth.Brown@state.co.us
Robert Walters
Invasive Species Specialist
Robert.Walters@state.co.us

all photos © cpw/ans program unless otherwise indicated.
Cover: quagga mussels © michael porter, u.s. army corps of engineers

��Table of Contents
WELCOME!
Agenda . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Outdoor Demonstration­—Entrance Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Chapter 1:
Introduction and State ANS Program Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  5

Chapter 2:
Zebra and Quagga Mussel Biology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Chapter 3:
Other ANS Biology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Chapter 4:
Watercraft 101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Chapter 5:
Watercraft Inspection Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Chapter 6:
Watercraft Decontamination Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Table of Contents

1

�Agenda
State of Colorado—Parks and Wildlife
Watercraft Inspection and Decontamination Certification
Training Agenda—Day 1 of 2

9:00 am

Welcome!

9:00–9:30 am

Entrance Boat Inspection Demonstration and Discussion

9:30–10:00 am

Introduction: State ANS Program Overview

10:00–10:30 am

Zebra and Quagga Mussel Biology

10:30–11:00 am

OUTSIDE—How Many Mussels Can You Find?

11:00–11:30 pm

Other ANS Biology

11:30–12:30 pm

Watercraft 101 (including outdoor session on boat anatomy)

12:30–1:30 pm

LUNCH BREAK (on your own)

1:30–3:30 pm

Inspection Protocol
DEMO—WID Mobile and Seal Application (half way through lecture)

3:30–4:30 pm

OUTSIDE—Inspection Practice (groups of three—inspector, boater, observer)

4:30–5:00 pm

Summarize Day 1

5:00 pm

Adjourn

STUDENT HOMEWORK—MEMORIZE ENTRANCE INSPECTION PROTOCOL AND
ANSWER QUESTIONS AT THE END OF EACH CHAPTER.
Breaks will be given approximately every 90 minutes, sometimes longer.
We will break for lunch in the noon hour. Lunch is on your own.

2

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�State of Colorado—Parks and Wildlife
Watercraft Inspection and Decontamination Certification
Training Agenda—Day 2 of 2

9:00–9:30 am

Day 1 Chapter Review Questions

9:30–10:00 am

Exit Inspection Demonstration

10:00–11:00 am

Outside: Exit Inspection Practice (Groups of 3—Boater, Inspector, Observer)

11:00–11:30 am

Decontamination Overview

11:30–12:00 pm

OUTSIDE—Decontamination Unit Standard Operating Procedures, Winterization
and Attachments

12:00–1:00 pm

LUNCH (on your own)

11:00–3:00 pm

Decontamination (two concurrent groups unless class size is 10 or less)
1. Indoor—Decontamination Manual
• Standing Water Decontamination
• Interior Compartments
• Engine Flush—Outboard, I/O, Inboards
• Ballast Tank Flush
• Plant Decontamination
• Bait Treatment: Live Aquatic Bait and Crayfish Regulations
• Full Decontamination
2. Outdoor—Decontamination Demonstration and Practice
• Standing Water Decontamination
• Interior Compartments
• Engine Flush—Outboard, I/O, Inboards
• Hull and Trailer Decontamination

3:00–3:30 pm

Questions and Answers

3:30–4:00 pm

Final Exam—Inspector and Decontamination Certification

4:00–5:00 pm

Grade Exams &amp; Review Answers

5:00 pm

Adjourn
Agenda

3

�Outdoor Demonstration—Entrance Inspection
What Did You Observe?
1. ______________________________________________________________________________________
2. ______________________________________________________________________________________
3. ______________________________________________________________________________________
4. ______________________________________________________________________________________
5. ______________________________________________________________________________________
6. ______________________________________________________________________________________
7. ______________________________________________________________________________________
8. ______________________________________________________________________________________
9. ______________________________________________________________________________________
10. ______________________________________________________________________________________
11. ______________________________________________________________________________________
12. ______________________________________________________________________________________
13. ______________________________________________________________________________________
14. ______________________________________________________________________________________
15. ______________________________________________________________________________________
16. ______________________________________________________________________________________
17. ______________________________________________________________________________________
18. ______________________________________________________________________________________
19. ______________________________________________________________________________________
20. ______________________________________________________________________________________

4

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�C O L O R A D O

P A R K S

&amp;

W I L D L I F E

Chapter 1
Introduction and State ANS
Program Information

cpw.state.co.us
Chapter 1: Introduction and State ANS Program Information

5

��Chapter 1: Introduction and
State ANS Program Information
What are Aquatic Nuisance Species (ANS) or
Aquatic Invasive Species (AIS)?
Aquatic nuisance species (ANS) or aquatic invasive
species (AIS) are also called non-native species, exotic
species, non-indigenous species, noxious weeds, or
pests. ANS can be plants or animals. Invasive aquatic
plants are introduced plants that live either partially or
completely submerged in the water and out-compete
native species for light, space and nutrients creating a
dense monoculture. Invasive aquatic animals also outcompete native species and require a watery habitat,
but do not necessarily have to live entirely in water.
ANS plants and animals not only threaten native
species but also interfere with recreational activities
and municipal, industrial, commercial, and
agricultural water supply, storage, and distribution.
In their native environments, ANS populations are
typically held in check and controlled by predators,
parasites, pathogens, or competitors. However,
when they are transported to a new environment,
the natural checks are usually left behind. This
gives invasive plants and animals an advantage over
native species and makes them very difficult, if not
impossible, to control. Long-term management of
invasive species is costing the U.S.A. over $200 billion
dollars a year (Pimental et al 1996).
How are ANS defined?
“’Aquatic Nuisance Species’ means exotic or non-native
aquatic wildlife or any plant species that have been
determined by the [Parks] Board to pose a significant
threat to the aquatic resources or water infrastructure of
the state.”

[Colorado Senate Bill 08-226 signed by
Governor Bill Ritter Jr. in May 2008 (“ANS Act”)].

“A species that is: 1.) non-native (or alien) to the
ecosystem under consideration and 2.) whose
introduction causes or is likely to cause economic or
environmental harm or harm to human health.”

[Executive Order 13112 signed by
President William Clinton on February 3, 1999
(“Invasive Species Act”)]

What is the purpose of this State Watercraft
Inspection and Decontamination Training
Curriculum?
As referenced in the ANS Regulation #800M, this
document details the standard “WID [Watercraft
Inspection and Decontamination] Procedures” that
Colorado Authorized Locations [a.k.a. Inspection
and Decontamination Stations] and Authorized
Agents [a.k.a. Inspectors and Decontaminators]
must adhere to.
The WID Procedures described in the following pages
and taught in the CPW Training and Certification
Course has been proven to reduce the risk of mussels
and other ANS being introduced into our precious
waters, through implementation of a risk-based
prevention and containment program that has
resulted in the interception of 281 infested mussel
boats from 2009–2019.
What ANS is Colorado concerned about?
While this handbook puts special emphasis on
preventing introductions of two species that have
the most significant economic, cultural and natural
resource impacts—zebra and quagga mussels or
ZQM—the procedures apply to all aquatic nuisance
species, both plant and animal. The following table
lists the ANS plants and animals prohibited in the
ANS Regulation #800A:
ANIMALS
Common Name
Crayfish, rusty

Scientific Name
Faxonius rusticus

(also known as Orconectes rusticus)

Mussel, quagga

Dreissena rostriformis
bugensis

Mussel, zebra

Dreissena polymorpha

New Zealand mudsnail

Potamopyrgus antipodarum

Water Flea, fishhook

Cercopagis pengoi

Water Flea, spiny

Bythotrephes longimanus
(also known as Bythotrephes
cederstroemi)

Chapter 1: Introduction and State ANS Program Information

7

�PLANTS
Common Name

Scientific Name

African elodea

Lagarosiphon major

Brazilian elodea

Egeria densa

Eurasian watermilfoil

Myriophyllum spicatum

Giant salvinia

Salvinia molesta

Hyacinth, water

Eichornia crassipes

Hydrilla

Hydrilla verticillata

Parrotfeather

Myriophyllum aquaticum

Yellow floating heart

Nymphoides peltata

A comprehensive list
and description of ANS
that could negatively
impact native species,
recreation, or water
resources is provided in
the Colorado ANS Pocket
Guide [CDOW and
Colorado Department
of Agriculture, 2010].
Additional information
about zebra and quagga
mussels, New Zealand
mudsnails and other
native and non-native
mollusks can be found
in the Colorado Mollusk
Pocket Guide [CDOW,
2011]. Chapter 3 titled
“Other ANS” describes
the highest priority
invasive species. It is
imperative that inspectors
and decontaminations
strive to prevent or
contain introductions of
all invasives by ensuring
watercraft are clean,
drained and dry—no
mud, no mussels, no
water, and no plants—
before launching and
after retrieval in Colorado
waters.

8

State ANS Program Information
The CPW Invasive Species Program provides
coordination and support for the management of all
invasive species on CPW properties, which includes
both terrestrial and aquatic plants and animals.
However, the focus of the Invasive Species Program is
on the statewide coordination of a partnership based
ANS prevention and containment program.
Our Mission
“To protect wildlife, natural resources,
recreation, infrastructure, agriculture
and the economy by 1.) preventing
the introduction of zebra and quagga
mussels, and other invasive species,
2.) by containing current infestations
and 3.) stopping the spread of invaders
into new waters.”
Legal Authority
The State responded quickly to the
increased threat of zebra and quagga
mussels in the western US following
the invasion of Lake Mead and
some initial detections of juvenile
microscopic mussels and eDNA in
Colorado. The Colorado General
Assembly passed passed the State ANS
Act on May 29, 2008. The Act defines
ANS and makes it illegal to possess,
import, export, ship, transport, release,
plant, place, or cause an ANS to be
released. The Act created an ANS Fund
in CPW for implementation.
The ANS Act provides authority to
Qualified Peace Officers to inspect,
and if necessary, decontaminate or
quarantine watercraft for ANS. It
provides authority for CPW to certify
individuals as “Authorized Agents”
(a.k.a. inspectors and decontaminators)
to work at “Authorized Locations”
(a.k.a. watercraft inspection and
decontamination stations or WIDS)

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�for the purposes of inspecting and decontaminating
watercraft to prevent new introductions and contain
existing detections of ANS.
The Parks Board (now Parks and Wildlife
Commission) passed regulations required by
the Act on February 20, 2009. The regulations
require mandatory watercraft inspection and
decontamination, if necessary, of:
1. watercraft coming in from out of state
2. watercraft leaving a suspect or positive water in
Colorado
3. watercraft entering a high-risk water where
inspections and decontaminations are required by
the managing agency.
The ANS Regulations set the standard for
certification, watercraft inspection, decontamination,
impoundment, sampling, monitoring, identification,
and reporting.
Following the passage of the ANS Regulations,
CDOW published the State ZQM Management Plan.
Implementation began in March 2009 and is ongoing
today. The ZQM Plan outlines the statewide approach
to zebra and quagga mussel management and
mirrors the regulations. Implementation of the plan is
partnership based and dependent on many entities to
ensure a standardized and seamless approach across
jurisdictions.
ANS Regulations
https://cpw.state.co.us/Documents/RulesRegs/
Regulations/ChP08.pdf
ANS Act
https://cpw.state.co.us/Documents/WildlifeSpecies/
AquaticNuisance/ANS_ACT_SB08_226.
pdf#search=State%20ANS%20Act
Mussel Free Colorado Act
https://leg.colorado.gov/bills/hb18-1008

Sampling/Monitoring
DEFINITIONS:
Gene Sequencing—A process for species
identification using advanced molecular
analysis.
Larval—The larvae or initial life stage of a zebra
or quagga mussel (and Asian clams or other
mollusks) is the free-floating infant stage of a
mussel, also called a veliger.
Microscopic—Too small to be seen by the
unaided eye but large enough to be studied
under a microscope.
Microscopy—The science of examining and
identifying organisms under the microscope.
Plankton—passively floating, drifting, or
somewhat motile organisms occurring
in a body of water, primarily comprising
microscopic algae and protozoa. Often the
bottom of the food chain.
PCR—Polymerase Chain Reaction—A process
for amplification of DNA for species
identification.
Plankton Tow—A cylindrical net with a fine mesh
is dropped into a body of water to capture any
plankton, veligers, or other organisms in the
net, where it can then be analyzed in a lab.
Settlers—Or juvenile mussels. As a veliger grows
out of the veliger or larval stage, it undergoes
a metamorphosis. The animal begins to grow
a shell and will settle onto a semi-hard or hard
surface to finish developing. At this stage, the
settlers will feel like sandpaper or grit.
Substrate—1.) A device used to monitor for
the settler stage of zebra or quagga mussels,
typically consisting of a black, rough PVC
pipe suspended in the water body between a
buoy at the surface and a weight at the bottom.
2.) The bottom of the water body, where
organisms live—the benthos or benthic area.
Veliger—The free-swimming larva of a mollusk.
During the veliger stage, the mollusk begins
to develop a shell. They are microscopic at this
state and can only be seen under a microscope.

Chapter 1: Introduction and State ANS Program Information

9

�For more than a decade, CPW has implemented a
comprehensive early detection program for zebra
and quagga mussels and other ANS. Waters were
selected from a prioritization ranking resulting from
a risk assessment, which was conducted specifically to
determine the potential risk of introduction of zebra
and quagga mussels. The risk assessment identified
168 total lakes and reservoirs, of which the sampling
frequency varies from once per year to every 4 weeks
depending on the risk level. Very high and high risk
waters are visited every month. Medium risk waters
are monitored 2–3 times per year and low risk waters
are monitored 1–2 times per year. Streams and rivers
are monitored on a rotating basis annually by need
and priority as funding and resources allows.
CPW has sampled 584 “at-risk” waters for ANS.
The state follows a three-tier sampling protocol and
a three-phase identification process for the early
detection of zebra or quagga mussels: 1.) conducting
plankton tows to find the veligers, 2.) deploy and
check substrates to find the juvenile “settlers” or
attached adult mussels, and 3.) conduct surveys
along the shoreline and existing structures for settled
juveniles or attached adult mussels. CPW ANS
Crews also perform crayfish trapping, aquatic plant
inventories, and stream surveys for early detection
purposes, as well as long term monitoring of known
invasive populations. The CPW ANS Program also
catalogs native plants, mollusks and crustaceans
detected for natural history inventory purposes.
Minimum Criteria for Detection
The Western Regional Panel standards for positive
detection of zebra or quagga mussels is based on the
minimum criteria for detection. Colorado follows
these minimum standards and the state protocols are
detailed below for each life stage.
• Veligers—the following tests must all be positive
on the same sample.
• Microscopy (visual ID of an animal)
• PCR (genetic or molecular identification
of the species)
• Gene Sequencing (genetic or molecular
confirmation of the species identification)
• Settlers—Taxonomic identification by two
independent experts.
• DNA analysis may or may not be
required.

10

•

Adults—Taxonomic identification by two
independent experts.
• DNA analysis may or may not be
required.

There have never been any adult ZQM detected in
Colorado’s waters.
Water Body Classifications
Colorado adheres to the Western Regional Panel
standards for water body classification related to early
detection sampling and monitoring for zebra and
quagga mussels. The definitions for detected waters
are below:
• Negative: Sampling/testing is ongoing and
nothing has been detected, or nothing has been
detected within the time frames for de‐listing.
• Inconclusive (temporary status): Water body
has not met the minimum criteria for detection
(e.g. a single eDNA hit).
• Suspect: Water body that has met the minimum
criteria for detection.
• Positive: Multiple (2 or more) subsequent
sampling events that meet the minimum criteria
for detection.
• Infested: A water body that has an established
(recruiting or reproducing) population.
De-Listing Standards
The Western Regional Panel standards also set
timelines for de‐listing detected waters, as detailed
below. In adopting the regional standard Colorado
de‐listed Granby, Grand Lake, Shadow Mountain,
Willow Creek, Tarryall, Jumbo, and Blue Mesa in
2014 and Pueblo Reservoir in 2017.
The timelines for de‐listing are below:
• Inconclusive: 1 year of negative testing including
at least one sample taken in the same month
of subsequent year as the positive sample
(accounting for seasonal environment variability)
to get to undetected/negative.
• Suspect: 3 years of negative testing to get to
undetected/negative.
• Positive: 5 years of negative testing to get to
undetected/negative.
• Infested: Following a successful eradication or
extirpation event including a minimum of 5 years’
post‐event testing/monitoring with negative
results.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Per the state ANS Regulations, trailered watercraft
must submit to an inspection, and decontamination
if needed, prior to entrance in Colorado’s waters
following boating out of state or boating on a positive
or suspect water. Boaters are also required to submit
to an inspection prior to entering a water body
where inspections are required by the managing
agency. All persons performing inspections and/or
decontaminations must be certified by CPW.

Watercraft Inspection and Decontamination (WID)
CPW coordinates a vast network of WID stations
that are operated by CPW, the National Park
Service, Larimer County, several municipalities,
and numerous private industry locations including
businesses, concessioners, marinas, clubs, and private
lakes. In total, the state has collectively performed over
4.9 million inspections and 119,814 decontaminations
since 2008.

Number of Authorized Locations by Entity
Entity Type

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

Colorado Parks &amp; Wildlife

-

-

-

-

38

37

37

32

32

30

29

29

Division of Wildlife

5

160

19

19

-

-

-

-

-

-

-

-

Larimer County

0

2

2

2

2

2

2

2

2

3

2

2

Municipalities

3

7

11

9

8

8

8

8

8

7

8

8

National Park Service

0

1

1

1

1

1

1

1

1

1

1

1

Private Industry

3

11

51

30

24

27

27

28

28

31

32

32

State Parks

24

28

28

28

-

-

-

-

-

-

-

-

Total

35

209

112

89

71

75

75

71

71

72

72

72

Colorado Watercraft Inspection and Decontamination Stations for 2020

Chapter 1: Introduction and State ANS Program Information

11

�Types of Watercraft Inspection and
Decontamination Stations
•

•

•
•

Negative Prevention Waters: Waters that have
never had a verified detection of any ANS or have
not had a detection within the time frame for de‐
listing.
Other ANS Containment Waters: Waters that
are positive for an Other ANS. They have a
verified presence of an ANS listed in Chapter 8
regulations other than zebra or quagga mussels.
Most ANS Positive waters are also prevention
waters for mussels and other ANS.
ZQM Containment Waters: Waters that have
had a verified zebra or quagga mussel detection.
Off Water Locations: Authorized locations that
are not located at a water body.

WID Training and Certification
CPW taught 59 WID certification courses in
2019, in addition to maintaining an online recertification program for experienced inspectors
and decontaminators. There have been a total of 869
trainings since the program’s inception. In addition to
the online course for experienced staff, the Invasive
Species Program within CPW also maintained two
other specialized WID courses: theWID Trainer’s
Training and Advanced Decontamination. CPW
certified 773 individuals last year, for a total of 7,631
people certified or re-certified in WID since the
training program was implemented in 2009.

CPW currently has authorized 72 locations to
perform watercraft inspection and decontamination.
Of those, Green Mountain Reservoir is operated as
a containment operation for quagga mussel veligers,
and twelve locations are operated as containment for
other ANS. The focus of the containment program
is to inspect watercraft leaving the lakes/reservoirs
to prevent boats from moving ANS overland into
currently uninfested areas, while maintaining
prevention activities upon entrance to the reservoir.
Fifty-nine locations operate as prevention locations.
Prevention locations are those that are negative for all
ANS or are not located at a waterbody (e.g. offices or
marine dealers).
Number of Inspections and Decontaminations
Performed in Colorado
A total of 481,543 inspections and 22,947
decontaminations were performed in Colorado
in 2019.
In total, the state has collectively performed over
4.9 million inspections and 119,814 decontaminations
since 2008.
Mussel Boat Interceptions
Last year the state intercepted more watercraft infested
with zebra or quagga mussels than ever before. All of
these watercraft were fully decontaminated prior to
being allowed into Colorado’s waters. Since 2009, a

Inspec3ons	&#13;  
500,000	&#13;  
450,000	&#13;  

396,104	&#13;  

437,520	&#13;  

415,302	&#13;  

411,687	&#13;  

404,503	&#13;  

486,156	&#13;  
428,457	&#13;  

475,156	&#13;  

474,519	&#13;  

481,543	&#13;  

426,624	&#13;  

400,000	&#13;  
350,000	&#13;  
300,000	&#13;  
250,000	&#13;  
200,000	&#13;  
150,000	&#13;  

118,587	&#13;  

100,000	&#13;  
50,000	&#13;  
0	&#13;  
Colorado	&#13;  Parks	&#13;  &amp;	&#13;  Wildlife	&#13;  
Division	&#13;  of	&#13;  Wildlife	&#13;  

2009	&#13;  

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2013	&#13;  

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2015	&#13;  

2016	&#13;  

2017	&#13;  

2018	&#13;  

2019	&#13;  

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0	&#13;  

0	&#13;  

0	&#13;  

266,076	&#13;  

259,235	&#13;  

283,108	&#13;  

282,092	&#13;  

331,361	&#13;  

324,568	&#13;  

318,735	&#13;  

324,342	&#13;  
0	&#13;  

4,587	&#13;  

52,608	&#13;  

70,165	&#13;  

63,155	&#13;  

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114,000	&#13;  

214,690	&#13;  

224,640	&#13;  

223,739	&#13;  

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0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

Larimer	&#13;  County	&#13;  

0	&#13;  

62,595	&#13;  

64,813	&#13;  

61,489	&#13;  

49,741	&#13;  

60,036	&#13;  

54,555	&#13;  

59,968	&#13;  

59,500	&#13;  

58,489	&#13;  

57,015	&#13;  

55567	&#13;  

MunicipaliGes	&#13;  

0	&#13;  

20,569	&#13;  

24,563	&#13;  

24,422	&#13;  

28,331	&#13;  

26,527	&#13;  

24,797	&#13;  

18,121	&#13;  

23,487	&#13;  

17,268	&#13;  

25,298	&#13;  

27,339	&#13;  

NaGonal	&#13;  Park	&#13;  Service	&#13;  

0	&#13;  

27,582	&#13;  

35,557	&#13;  

21,913	&#13;  

18,374	&#13;  

18,445	&#13;  

21,318	&#13;  

17,784	&#13;  

20,979	&#13;  

23,741	&#13;  

22,486	&#13;  

18257	&#13;  

Private	&#13;  Industry	&#13;  

0	&#13;  

18,060	&#13;  

17,782	&#13;  

20,584	&#13;  

49,165	&#13;  

40,260	&#13;  

44,679	&#13;  

48,659	&#13;  

50,829	&#13;  

51,090	&#13;  

50,985	&#13;  

56,038	&#13;  

118587	&#13;  

396,104	&#13;  

437,520	&#13;  

415,302	&#13;  

411,687	&#13;  

404,503	&#13;  

428,457	&#13;  

426,624	&#13;  

486,156	&#13;  

475,156	&#13;  

474,519	&#13;  

481,543	&#13;  

State	&#13;  Parks	&#13;  

12

2008	&#13;  

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Decontamina5ons	&#13;  
22,947	&#13;  

25,000	&#13;  

19,111	&#13;  

20,000	&#13;  

16,224	&#13;  

15,000	&#13;  

11,740	&#13;  

13,020	&#13;  

14,904	&#13;  

8,428	&#13;  

10,000	&#13;  
5,000	&#13;  

3,364	&#13;  

3,120	&#13;  

2,833	&#13;  

3,997	&#13;  

126	&#13;  
0	&#13;  

2008	&#13;  

2009	&#13;  

2010	&#13;  

2011	&#13;  

2012	&#13;  

2013	&#13;  

2014	&#13;  

2015	&#13;  

2016	&#13;  

2017	&#13;  

2018	&#13;  

2019	&#13;  

Colorado	&#13;  Parks	&#13;  &amp;	&#13;  Wildlife	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

1,009	&#13;  

3,543	&#13;  

8,746	&#13;  

7,965	&#13;  

10,373	&#13;  

9,816	&#13;  

9,246	&#13;  

10284	&#13;  

Division	&#13;  of	&#13;  Wildlife	&#13;  

47	&#13;  

1,025	&#13;  

775	&#13;  

1,443	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

State	&#13;  Parks	&#13;  

79	&#13;  

511	&#13;  

365	&#13;  

315	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

0	&#13;  

MunicipaliDes	&#13;  

0	&#13;  

554	&#13;  

590	&#13;  

415	&#13;  

664	&#13;  

703	&#13;  

1,348	&#13;  

2,025	&#13;  

2,024	&#13;  

2,455	&#13;  

6,026	&#13;  

8,759	&#13;  

Larimer	&#13;  County	&#13;  

0	&#13;  

635	&#13;  

1,029	&#13;  

271	&#13;  

217	&#13;  

212	&#13;  

258	&#13;  

1,178	&#13;  

1,325	&#13;  

601	&#13;  

1,027	&#13;  

1078	&#13;  

NaDonal	&#13;  Park	&#13;  Service	&#13;  

0	&#13;  

219	&#13;  

239	&#13;  

290	&#13;  

338	&#13;  

1,501	&#13;  

627	&#13;  

380	&#13;  

501	&#13;  

606	&#13;  

618	&#13;  

625	&#13;  

Private	&#13;  Industry	&#13;  

0	&#13;  

420	&#13;  

122	&#13;  

99	&#13;  

1,769	&#13;  

2,469	&#13;  

761	&#13;  

1,472	&#13;  

2,001	&#13;  

1,426	&#13;  

2194	&#13;  

2,201	&#13;  

126	&#13;  

3,364	&#13;  

3,120	&#13;  

2,833	&#13;  

3,997	&#13;  

8,428	&#13;  

11,740	&#13;  

13,020	&#13;  

16,224	&#13;  

14,904	&#13;  

19,111	&#13;  

22,947	&#13;  

Total	&#13;  

total of 281 boats with attached adult zebra or quagga
mussels were intercepted coming into Colorado.

The infested vessels were coming from Arizona,
California, Florida, Georgia, Illinois, Indiana, Iowa,
Kansas, Kentucky, Louisiana, Maine, Michigan,
Minnesota, Mississippi, Missouri, New York, Nevada,
Oklahoma, Ohio, Pennsylvania, Texas, Utah, and
Wisconsin. The majority of the intercepted vessels
were coming from Arizona, Lake Powell, the Great
Lakes, or Mississippi River states. All boats were fully
decontaminated to ensure all mussels were dead, and
no mussels were visibly attached to the vessel.

In the past, infested vessels have been intercepted
at Barr Lake, Blue Mesa, Boulder Marine, Boulder
Reservoir, Boyd Lake, Canon Marine, Carter, Cherry
Creek, Chatfield, Clear Creek, Crawford, Denver
CPW Office, Dillon, Electra Lake, Eleven Mile, Frisco
Bay Marina, Granby, Grand Lake, Grand Junction
CPW Office, Great Lakes Marine, Green Mountain,
Highline, Horsetooth,
Jackson, John Martin,
Zebra and Quagga Mussel Positive Interdiction Sites in Colorado
Lathrop, McPhee,
Navajo, North Sterling,
Pueblo, Ridgway, Rifle
Gap, Roadside (SW
Colorado), Ruedi,
Shadow Mountain,
Spinney Mountain,
Stagecoach, Steamboat
Lake, Strontia Springs,
Sweitzer, Taylor Park,
Trinidad, Turquoise,
Vallecito, and Williams
Fork.

Chapter 1: Introduction and State ANS Program Information

13

�Boat Origin for Zebra and Quagga Mussel Positive Interdictions in Colorado

WID Quality Control
The CPW Quality Control and Field Support Team
perform quality control evaluations annually at state
certified watercraft inspection and decontamination
stations to ensure that standard procedures are being
followed, per regulatory requirements in #802-805.
The team also ensures that stations are stocked with
educational materials and provide on the job training
to inspectors and supervisors. The quality control
program consists of secret shopper evaluations,
announced evaluations, on the job training, and
customer service evaluations.
State Fish Hatchery Program
and Aquatic Biologists
To date, invasive mussels have not been identified
in a Colorado hatchery. Proactive measures have
been put in place statewide to protect hatcheries and
state waters from an invasive species introduction.
Those measures include Annual Fish Health
Inspections, HACCP, Trainings, and Workshops.
Statewide preventative measures also include
implementation of standardized disinfection
protocols for wild spawn, fish transfers, and egg
transfers. CPW explored methodologies for
14

disinfection for fish being transported from Pueblo
Fish Hatchery despite the hatchery never testing
positive for mussels. For wild spawn operations,
specialized trailer units have been constructed for all
wild fish spawning operations to ensure no ANS are
transported. Biologists have decontamination units,
and are required to decontaminate work boats and
equipment in between each use.
CPW ANS Sampling Staff
ANS Sampling Crew members are WID Stage
II Authorized Agents and are required to fully
decontaminate their watercraft, trailer, and gear in
between each and every use. They will seal their
boats and issue receipts upon completion of the full
decontamination. The Invasive Species Program
Office supervises the sampling crews and hold
them to strict decontamination standards. They
are instructed to stop at the inspection stations and
provide the inspector their seal receipt. Please work
together as a team with them and get the crews on the
water fast to conduct ANS sampling, versus wasting
ANS dollars by having them sitting in long lines or
being re-inspected following a full decontamination.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Western Regional Activities
Western state programs are connected
and working together to provide more
communication and coordination
between WID stations. All states in
the West now have ANS Programs.
Unfortunately, many states are
underfunded and understaffed.
Education
and Outreach
Education and
Outreach is the
MOST important
thing! There will
never be enough
money to have
Authorized Agents
on all boat ramps
all the time. Each
inspection is a face-to-face opportunity
to educate the boater and change
their behavior by teaching them to
clean, drain, dry every time they boat.
Consistency in messaging is key for
boaters to learn Clean, Drain, Dry!
The CPW ANS Program trains almost
800 individuals per year, and it is the
inspector’s job to train the 85,000+
registered Colorado boaters through repeated
face-to-face educational contacts on the boat ramps
while doing 480,000+ inspections per year.
There are many educational tools to help you. Spend
time learning the text of CPW provided brochures
and signage so that all Agents provide consistent

information to the public. Provide a ‘Boaters Guide
to ANS Inspections’ brochures immediately upon
making contact with the boat operator. There are also
handouts on specific topics, rack cards for anglers
and divers, youth materials, and standard signage
available. Display mussel props on busy weekends
and show them to boaters.

WID Supervisors Meeting January 2020

Chapter 1: Introduction and State ANS Program Information

15

�Chapter 1 Review Questions
1. What are Aquatic Nuisance Species (ANS)?
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
2. What two ANS is Colorado the most concerned about?
______________________________________________________________________________________
3. The mission of the CPW Invasive Species Program is to protect wildlife, natural resources, recreation,
infrastructure, agriculture and the economy by:
a. Preventing the introduction of ZQM and other invasive species
b. Containing current infestations/introductions
c. Stopping the spread of invaders to new waters
d. All of the above
4. The ANS regulations require mandatory watercraft inspection and decontamination, if necessary,
of watercraft that:
1.) ____________________________________________________________________________________
2.) ____________________________________________________________________________________
3.) ____________________________________________________________________________________
4.) ____________________________________________________________________________________
5. Fill in the blank next to the following definitions with the letter of the corresponding classification.
A. Inconclusive
B. Positive
C. Suspect
D. Infested
E. Negative
____ Testing is ongoing and no evidence of Dreissena mussels has been discovered.
____ eDNA detection with no confirmation (one hit wonder).
____ One verified detection of mussel veliger or adults.
____ More than one verified detection of mussel veliger or adults.
____ A reproducing and recruiting population of mussels is established.
6. Why is education the most important aspect of being an inspector?
a. So that boaters learn to keep their boats and equipment clean, drained, and dry, and do it themselves
		 without inspectors every single time.
b. Because the state cannot put inspectors on all of the reservoirs in Colorado all the time.
c. The best way to change a behavior is through education.
d. All of the above
16

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�7. CPW operates all of the WID stations in Colorado. (circle one) True or False
8. Which Colorado fish hatcheries have tested positive for mussel veligers?
a. Leadville National Hatchery
b. Mt. Shavano Hatchery
c. Pueblo Hatchery
d. No hatcheries in Colorado have ever tested positive for invasive mussels.
9. Name the four types of WIDS:
1.) _______________________________________
2.) _______________________________________
3.) _______________________________________
4.) _______________________________________
10. How many invasive mussel boats have been intercepted since 2009? ____________
11. Which waterbody in Colorado is positive for quagga mussels in 2020?
a. Ridgway Reservoir
b. Tarryall Reservoir
c. Pueblo Reservoir
d. Green Mountain Reservoir
e. Cherry Creek Reservoir
f. None of the Above
12. Which waterbody in Colorado is suspect for quagga mussels in 2020?
a. Ridgway Reservoir
b. Tarryall Reservoir
c. Pueblo Reservoir
d. Green Mountain Reservoir
e. Cherry Creek Reservoir
f. None of the Above
13. How many waters in Colorado are positive for zebra mussels?
a. 7
b. 8
c. 1
d. 0
e. 5
Continued on page 18
Chapter 1: Introduction and State ANS Program Information

17

�14. Fill in the blanks below regarding state protocols to positively identify mussels.
a. Veligers—the following tests must be on the same sampler.
• ___________________  (visual ID of an animal)
• PCR (genetic or molecular identification of the species)
• Gene Sequencing (genetic or molecular confirmation of the species)
b. Settlers—Taxonomic identification by  ____  independent expert(s)
c. Adults—Taxonomic identification by  ____  independent expert(s)
15. How many years of negative testing does it take to de-list a suspect reservoir? _______
16. How many years of negative testing does it take to de-list a positive reservoir? _______
17. It is the inspector’s job to educate every boater and customer about how they can help to prevent
invasive species? (circle one) True or False
18. What are the three reasons that decontaminations are increasing?
1.) ____________________________________________________________________________________
2.) ____________________________________________________________________________________
3.) ____________________________________________________________________________________
19. What reservoir are the majority of infested mussel boats coming from? _______________________________
20. Please describe why you think it is important to prevent the introduction of zebra or quagga mussels,
and other ANS, into Colorado’s waters.
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________

Notes
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________

18

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�C O L O R A D O

P A R K S

&amp;

W I L D L I F E

Chapter 2
Zebra and Quagga Mussel
Biology

cpw.state.co.us
Chapter 2: Zebra and Quagga Mussel Biology

19

��Chapter 2: Zebra and Quagga
Mussel Biology
It is important to understand the biology and ecology
to answer questions from the public and partner
agencies and to be best equipped to find ZQM
attached to watercraft or equipment. The Colorado
program is grounded in the biology of this species.
• For example, all watercraft must be cleaned
(to prevent moving adults or settlers), drained
and dry (to prevent moving veligers in water).
• Another example is how Colorado performs early
detection for mussels in Colorado (plankton tows
for veligers, substrates for settlers and shoreline
surveys for adults).
• We know that mussels can be light
sensitive and begin establishment
in the depths of the water where we
physically can’t get to. Therefore, efforts
are prioritized to detect veligers in the
water column with the goal of detecting
the introduction, and not the invasion
that happens years later. This enables
managers to contain the spread to other
waters by hitchhiking on, or in watercraft.

Zebra Mussel

DEFINITIONS:
Benthic—Refers to the bottom of a water body.
Byssal threads—A spider-web like appendage that
enables the zebra or quagga mussels to attach
to surfaces. Native species do not have byssal
threads.
Dreissenids—A term referring to all species in the
genus Dreissenid which includes zebra and
quagga mussels.
Exotic—An exotic species is a species that is not
native to a given environment. Exotic species
often invade an ecosystem displacing or
destroying the native plants and animals.
Macrophytes—An aquatic plant, large enough to
be seen by the naked eye.
Maturation—The action or process of maturing.
Metamorphosis—The process of transformation
from an immature form to an adult form in
two or more distinct stages.
Non-Native/Non-Indigenous—A species that has
been introduced to a new environment, either
intentionally or unintentionally. It is out of its
native range.
Phytoplankton—Plankton consisting of
microscopic plants in water.
Water Column—The concept of the entire
water depth of a water body, from its bottom
(benthic zone) to the water surface.

Quagga Mussel

Zooplankton—Plankton consisting of
microscopic animals in water.

© lauren livo and steve wilcox

Actual Size
© u.s. geological survey

Chapter 2: Zebra and Quagga Mussel Biology

21

�© LEIGH ANNE MCCONNAUGHEY

Quagga Mussel

Zebra Mussel
Identification
Quagga mussels (Dreissena rostriformis bugensis)
and zebra mussels (Dreissena polymorpha) are small
freshwater bivalve mollusks (animals with two
shells). They are relatives of clams and oysters. It is
very difficult for a non-expert to tell the two species
apart. The shell color of both mussels alternate
between a yellowish and darker brown, often forming
stripes. Color patterns are highly variable and can be
attributed to environmental factors. They range in size
from microscopic up to about two inches long.
Several diagnostic features aid in identification.
Quagga mussels have a rounded angle, or carina,
between the ventral and dorsal surfaces. They also
have a convex ventral side that can sometimes be
distinguished by placing the shells on a flat surface.
The quagga mussel will topple over when stood on its
ventral side, whereas a zebra mussel will not topple
due to its triangular shape. Quagga mussels also have
a small byssal grove on the ventral side near the hinge.
They also have asymmetrical valves when viewed
from the front or ventral side.
Unlike native North American freshwater mussels,
which burrow in soft sediment, adult zebra and
quagga mussels can attach to most hard and semi-soft
surfaces via tiny threads called byssal threads. Native
species do NOT have byssal threads! These byssal
threads are one of three main invasive characteristics
that give zebra and quagga mussels an advantage over
natives, along with rapid reproduction and their
ability to filter feed at amazing rates.

22

© brad Henley

Ecology of Zebra and Quagga Mussels
Both zebra and quagga mussels can survive cold
waters, but cannot tolerate freezing. They can endure
temperatures between 1º–30ºC (33º–86ºF). Zebra
mussels need waters above 12ºC (54ºF) to reproduce,
while quagga mussels can reproduce in waters as cold
as 9ºC (48ºF). Adult mussels are light sensitive and
prefer to live in water around 200 to 300+ feet deep.
They are able to thrive in a wide range of conditions
including oxygen-depleted water.
Life Cycle
It is important that inspectors understand the life cycle
of ZQM because the inspection, decontamination,
and sampling protocols are based on their biology.
ZQM have three life stages; (1) veliger, (2) settler and
(3) adult.
1. The embryos
are microscopic
larvae, called
veligers. They
are free-floating
plankton in the
water column
and impossible
© U.S. Bureau of Reclamation
to see with the
naked eye. The veligers float in the water column
or are carried in the current for about four to eight
weeks.
2. The veligers undergo metamorphosis and develop
shells while settling out of the water column
onto a solid surface (which could include a grain

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�of sand or the skin or shells of native aquatic
species). This juvenile form of the mussel is
known as the settler stage. At this point in their
life cycle, they settle into the deep benthic zone of
the water column.
3. Upon maturation, adult mussels become sessile,
meaning fixed in one place or immobile. They
are attached semi-permanently with their byssal
threads. Adult mussels typically form dense
clusters in which they pile up on top of each other
essentially smothering the generation beneath
them. Their typical lifespan is four to five years.
Where Do Mussels Like to Hide?
•
•
•
•
•

Dark Places
Rough Surfaces
Right Angles
Shaded Spaces
Moist Places

Where Did They Come From?
Zebra mussels are native to the Black, Caspian, and
Azov Seas of Eastern Europe. They were discovered
in the Great Lakes in Lake St. Clair in 1988 and have
since spread to 31 states in the United States.
Quagga mussels are native to the Dnieper River
Drainage in the Ukraine. They were discovered first
in the Great Lakes in the Erie Canal and Lake Ontario
in 1989 and have since spread to 27 states in the
United States.
Zebra
Quagga and Zebra

© Glen Black

ships. Another method of dispersal from Europe to
the United States is through the transportation of
attached mature adults on anchors stored internally
in compartments on transoceanic vessels. Aquatic
nuisance species often hitch rides to other bodies
of water on the boats, trailers, and equipment that
people transport from place to place. Boaters and
anglers can inadvertently transport ANS on waders
and in bait buckets and live wells.
Zebra and quagga mussels likely made their way to
the Western USA on trailered recreational watercraft.
The first discovery west of the 100th Meridian was
in Lake Mead. The invasive quagga mussels found
in Lake Mead in 2007 were 1,000 miles farther west
than any other known colony of quagga mussels at
the time. The primary method of overland dispersal
of these mussels is through human-related activities,
especially trailered watercraft. Given their ability
to attach to hard surfaces and survive out of water
for extended periods [30 days!], many infestations
have occurred by adult mussels hitching rides on
watercraft. The microscopic larvae also can be
transported in bilges, ballast water, live wells, or any
other equipment that holds water.
Where Are Mussels in Colorado?
The are NO positive waters for zebra or quagga
mussels in Colorado!

How Did They Get Here?

Green Mountain Reservoir is considered “suspect” for
quagga mussels.

Many aquatic nuisance species, including zebra and
quagga mussels, were introduced into the Great
Lakes in the discharged ballast water of ocean-going
Chapter 2: Zebra and Quagga Mussel Biology

23

�History of Zebra and Quagga Mussels
in Colorado
There has never been an adult zebra or quagga mussel
found in a Colorado water body. However, the larval
stage of the mussels, known as veligers, were detected
in several waters in the past.
Most recently in August 2017, quagga mussel veligers
were identified at Green Mountain Reservoir by
the Bureau of Reclamation through microscopic
analysis of water samples and subsequently positively
identified using DNA testing. CPW confirmed
the federal results through genetic testing at an
independent laboratory. It is unknown if the
veligers were dead or alive at the time of detection.
Upon confirmation, CPW increased monitoring
at the reservoir, deployed a scuba dive team, and
worked with the Heeney Marina to implement
WID containment procedures. The site team was
gathered to further determine actions necessary for
containment and rapid response was initiated.
24

Colorado follows the western regional standards
for listing and de-listing water bodies for zebra and
quagga mussels, as documented in the Western
Regional Panel’s Building Consensus in the West
Workgroup: Final Summary Report 2011–2019. Per
this standard, Green Mountain Reservoir is currently
listed as a SUSPECT reservoir for quagga mussels.
A suspect reservoir requires three years of negative
testing to be de-listed to negative. There were no
new detections in 2018 or 2019. CPW intends to
delist Green Mountain in January 2021 pending no
positive results in 2020. If another veliger or an adult
be detected and confirmed through both microscopy
and genetic analysis by two independent laboratories,
the reservoir status will be upgraded to positive. A
positive reservoir requires five years of negative testing
to be de-listed to negative. If a reproducing adult
population is found, the reservoir will be listed as
infested. It is unlikely that an infested reservoir would
ever be de-listed, but standards allow for this with
five years of negative testing following a successful

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�eradication event. There are currently no known
treatments for eradication in an open water system
making de-listing impossible for infested waters.
Previous Detections of Zebra and Quagga Mussels
in Colorado:
Pueblo Reservoir tested positive for zebra and
quagga mussel veligers in 2007 and for quagga
mussel veligers in 2007, 2008, 2009 and 2011.
Grand Lake tested positive for one zebra mussel
and one quagga mussel veliger in 2008. There have
been no verified detections at Grand Lake since
2008.
Granby Reservoir, Shadow Mountain Reservoir,
Willow Creek Reservoir, Tarryall Reservoir, and
Jumbo Reservoir all tested positive for one quagga
mussel veliger in 2008. There have been no verified
detections at any of these waters since 2008.
Blue Mesa Reservoir tested positive for quagga
mussel eDNA in 2009, 2011 and 2012.
De-Listing Positive Waters:
Pueblo Reservoir was de-listed for quagga mussels
in January 2017 following five years of negative
results.
Pueblo Reservoir was de-listed for zebra mussels in
January 2014, along with the de-listing of Granby,
Grand Lake, Shadow Mountain, Willow Creek,
Tarryall, Jumbo, and Blue Mesa.
Green Mountain will be delisted in January 2021,
if no further detections occur in 2020.
Impacts
Zebra and quagga mussels pose a great ecological
and financial threat to the state. The invasion of these
mussels can affect every Coloradoan and visitor in
some way with devastating impacts.
Why Be Concerned?
• Ecological Impacts
• Recreational Impacts
• Economic Impacts
• Social Impacts
• Industrial Impacts
• Agricultural Impacts

Invasive Characteristic #1
Prolific Reproduction—Zebra and quagga mussels
reproduce exponentially. They can spawn year-round
if conditions are favorable. A single female mussel
can produce up to one million eggs a year! If only ten
percent of the offspring survive, there would be ten
septillion mussels in the waterway at the end of five
years! As the mussel population explodes, they cover
the bottom and sides of a waterway.
Invasive Characteristic #2
Byssal Threads—As mentioned before, zebra and
quagga mussels can attach via byssal threads to any
stable substrate in the water column such as rocks,
aquatic plants, artificial surfaces (cement, steel, rope,
etc.), crayfish, native clams, and other mollusks.
They attach to most underwater structures and can
form dense clusters that impair facilities and impede
the flow of water. They clog intake pipes and trash
screens, canals, aqueducts, and dams—disrupting
water supply to homes, farms, factories, and power
plants. Zebra and quagga mussels also degrade water
quality and can alter the taste and smell of drinking
water.
Invasive Characteristic #3
Filter Feeding—Ecological Impacts—Invasive
species have the ability to change aquatic ecosystems
and native plant and animal communities. As filter
feeders, these species remove large amounts of
microscopic plants and animals that form the base
of the food chain, leaving little or nothing for native
aquatic species. The amount of food the mussels eat
and the waste they produce has life-altering effects on
the ecosystem and can harm fisheries. ZQM attach to
and encrust native organisms, essentially smothering
them and removing them from the food chain. Zebra
and quagga mussels are one of the few species that
have the ability to
crash the entire food
web by removing
the base of the food
chain—plankton—
and by smothering
benthic organisms
that are a source of
food for larger fish.
© David Britton

Chapter 2: Zebra and Quagga Mussel Biology

25

�Zebra and quagga mussels are able to remove
substantial amounts of phytoplankton and suspended
particulate from the water. Each mussel can filter over
a liter of water per day. They decrease the availability
of food for smaller life forms, which in turn increases
water clarity, elevating the amount of light penetration
causing an increase in vegetation and a shift in
species dominance, which potentially alters the entire
ecosystem permanently.

© PHILIP MYERS, ANIMAL DIVERSITY WEB (http://animaldiversity.org)

© peter yates

Filter feeders reject unwanted mucous covered food
from their body known as pseudofeces. Pseudofeces
accumulate and create an unsuitable environment.
As waste from the mussels decomposes, oxygen
availability is depleted, and the pH becomes very
acidic causing toxic byproducts to be produced. The
accumulation of organic pollutants within the tissue
of the mussel is passed up the food chain, causing
increased exposure by wildlife.
Recreational impacts.
Invasive mussels encrust docks and boats. Attachment
of mussels can cause corrosion of steel and concrete
affecting its structural integrity. Attached mussels
increase drag on boats and can even sink navigational
buoys with their weight. Veligers or settlers can get
sucked up into the engine cooling system and clog the
engine from the inside causing it to overheat and be
damaged. Increased hull and motor fouling will result
in increased maintenance costs on vessels moored
for long periods of time. Zebra and quagga mussels
also impact fish populations and reduce sport-fishing
opportunities. Their sharp shells can cut the feet of
unsuspecting swimmers and beach goers.
Economic impacts.
As maintenance costs for power plants, water
treatment facilities and water delivery infrastructures
increase following a mussel infestation, so does the
cost of food and utilities. In the Great Lakes area,
maintenance costs for water treatment plants, power
26

plant intakes and dams have been in the billions of
dollars. The destruction of native fisheries causes
a wider economic losses in terms of tourism and
recreation dollars not spent. Marinas and watercraft
dealers could suffer business declines.
Management
The eradication of zebra mussels first occurred
in a closed, isolated 12-acre quarry in Virginia in
the 90s. A large volume of potassium
chloride chemical was used to treat the
water and kill the adults and larvae. More
recently, the Department of Defense
attempted eradication in 2010 at Offutt
Air Force Base in Nebraska. However, the
treatment in Offutt was not successful.
Eradicating or treating zebra or quagga
mussels in large water bodies and/or
connected waterways may not be possible
because current treatments would also kill other
aquatic life forms. New tools are being developed
and tested. As of today, there are no viable, costeffective, and environmentally friendly control
mechanisms available for open water systems.
Therefore, prevention is very important. If watercraft
are cleaned, drained, and dried in between water
bodies, the risk of transporting attached mussels or
other ANS will be eliminated.
The rapid invasion of United States waterways has
been attributed to the mussel’s ability to disperse
during all stages of its life. Mussels can spread to other
bodies of water by attaching to watercraft hulls and
anchors, trailers, and fishing equipment. Larvae can
be transported in bilge water, ballast water or live bait
wells. Mussel larvae also disperse naturally, and can be
carried by water currents to other lakes or reservoirs
downstream or through water diversions.
Since there are no viable control methods once
mussels are introduced in open water bodies,
prevention is our only defense. As a watercraft
inspector, your most important task is educating
the public both coming into and exiting your lake or
reservoir. Many lakes and reservoirs in the state will
not have inspections, therefore, it is essential that you:
1. Show the boaters how to inspect their boats
themselves.
2. Explain why inspection is critical to find mussels
and other ANS.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�3. Impress on the boater how zebra and quagga
mussels damage boats, ruin fishing opportunities,
harm the environment and impair water
infrastructure.
You need to drive home the primary educational
message to Clean/Drain/Dry and explain why
boaters need to do it each time they use their craft.
Teaching boaters and anglers to clean, drain, dry their
boats and gears themselves in between each and every
launch is invaluable! If boaters and anglers do this,
mussels will not spread!

© GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY

Outdoor Session—How Many Mussels Can You Find?

List the names of locations you find mussels on the watercraft.
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________

_________________________________________
_________________________________________
_________________________________________
_________________________________________
_________________________________________
_________________________________________
_________________________________________
Chapter 2: Zebra and Quagga Mussel Biology

27

�Chapter 2 Review Questions
1. Why is it important to learn ZQM biology?
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
2. Which are the three characteristics of zebra and quagga mussels that make them invasive?
a. Grow larger than most other mollusks, reproduce quickly, clear the water
b. Attach with byssal threads, rapid reproduction, filter feeding
c. Alter water chemistry, attach with byssal threads
d. Feed on aquatic weed beds and reduce native plant communities, attach with byssal threads, prolific or
		 rapid reproduction
3. The larval life stage of a mussel in which they are a free‐floating planktonic organism is called a
_______________. These juveniles then begin to develop shells and attach to solid surfaces which is known
as the  _______________  stage.  Upon maturation,  _______________  mussels are sessile, meaning fixed
in one place or immobile.
4. In addition to ecological impacts ZQM and other ANS cause major ______________ and ______________
impacts to the state.
5. Because many lakes and reservoirs in the state will not have inspections, it is essential to:
a. Show the boaters how to inspect their boats themselves
b. Explain why inspection is critical to find mussel settlers and other ANS
c. Impress on the boater how zebra and quagga mussels damage boats, ruin fishing opportunities, harm the
		 environment and impair water infrastructure
d. All of the above
6. Where do mussels like to hide on watercraft?
______________ angles, ______________ or ________________ places. ______________ surfaces.
7. Mussel veligers are microscopic and can be transported in standing water. (circle one) True or False
8. What is the primary message we want boaters to learn?
______________________________________________________________________________________
______________________________________________________________________________________

28

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�C O L O R A D O

P A R K S

&amp;

W I L D L I F E

Chapter 3
Other ANS Biology

cpw.state.co.us
Chapter 3: Other ANS Biology

29

��Chapter 3: Other ANS Biology
As you learned in the introduction module, there are
many species of aquatic plants and animals that are
invasive. The watercraft inspection
and decontamination program
prevents ANS from being introduced
into new waters.
Boat inspectors have detected
New Zealand mudsnails, Eurasian
watermilfoil, and rusty crayfish in the
past. While zebra and quagga mussels
are the highest priority, this program
is aimed at protecting the state’s
resources from all invaders being
transported on watercraft.
CPW developed and published the
Aquatic Nuisance Species Pocket Guide
in partnership with the Colorado
Department of Agriculture. This
booklet combines the various
prohibited species lists into a single
book that instructs the reader how
to report the species if they were to
find it.
•

Eurasian watermilfoil (EWM)—
An invasive aquatic plant known
to many Front Range locations,
Navajo Reservoir, and the Rio
Grande. The Colorado Dept. of
Agriculture requires management
per the State Weed Act and Rules.

•

New Zealand Mudsnails
(NZMS)—First detected in
Colorado in 2004. NZMS
continue to be found in new locations annually, including recent detections in the Gunnison River, Fourmile
Canyon Creek, Lake Capote, Monument Lake, Trinidad Lake, and the Uncompahgre River.

•

Rusty Crayfish—There are four known locations statewide. Regulation prohibits the live transport from
positive locations, in addition to all waters west of the Continental Divide where there are no native crayfish.
There were no new detections of rusty crayfish in recent years.

Chapter 3: Other ANS Biology

31

�Asian Clams
(Corbicula fluminea)
A Zebra/Quagga Mussel “Look‐a‐Like” Invader

Pathway of Introduction and Spread: Corbicula
fluminea is used in Asia as a food source and may
have been cultivated in the United States. It is also
used for fish bait, which is probably another way it has
been spread throughout North America. It is sold in
the aquarium trade as “pygmy clam”, or “golden clam.”

Asian clams are small non‐native bivalves that are
commonly mistaken for zebra and quagga mussels
in Colorado. They are often observed littering the
beaches with expansive shells, and therefore are
commonly confused with zebra or quagga mussels.
Its shells have striations (or ridges) which give it the
appearance of having stripes.

Impacts: The Asian clam invasion in North America
has created problems for power plants and water
canals because large numbers of clams block water
intake valves. They also compete with native bivalves
for food, and competition increases as Asian clam
populations explode.

Asian Clams
• Ridges or Striations
on Shells
• Does Not Have
Byssal Threads

Zebra or Quagga Mussels
• Smooth Shells with
Stripes or Colorations
• Has Byssal Threads

Identification: Adults can reach 50 to 65 mm in
length, although 25 mm is typical. Shell is oval, but
not elongated, and is deep on the hinge side. The
outer layer of shell has well defined, thick growth
rings and varied coloration. Older clams have a darker
colored shell, while younger clams are lighter brown
or tan.
Habitat: They prefer fast moving water because
currents provide food for these suspension feeders.
However, they are commonly found on the shorelines
of lakes and reservoirs.

Asian Clam

32

Current Status in Colorado: Corbicula has
experienced great success in North America and is
moving through Colorado rapidly. Asian clams were
first detected in the South Platte River in Colorado in
1993 and have since expanded their range to include
the Arkansas River, Gunnison River, San Juan River
and Colorado River basins (Cordeiro et al, 2007).

Asian Clam

Quagga
Mussel

Zebra Mussel

Quagga Mussel

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�New Zealand mudsnails (NZMS) are small aquatic
snails native to fresh waters of New Zealand. They
were first discovered in North America in the late
1980s in the Snake River, Idaho and Madison River,
Montana.
Identification: NZMS range in size from a grain of
sand to 1⁄8 inch in length and are black or brown in
color. The shell has about 51⁄2 spirals. If the shell is held
tip up with the opening toward you, the opening is
on the right. There is an attached operculum (cover)
which can close off the opening.
Habitat: Found in freshwater, brackish, or saline
waters with almost any substrate. Populations in saline
conditions produce fewer offspring and grow more
slowly. Also tolerates a wide range of temperatures,
ranging from near freezing to 82°F.
Pathway of Introduction and Spread: New Zealand
mudsnails are spread into new river systems primarily
by humans, although they can be carried on the feet
of dogs and wildlife. Anglers, boaters, researchers, and
others can carry NZMS to uninfested locations on

their boots and
gear. They can
survive up to 50
days on a damp
surface, giving
them ample time
to be transferred
from one body of
water to another
on fishing gear.
Impacts:
NZMS compete
with native
invertebrates,
including native
mollusks, for
space and food
resources. NZMS
may reduce the availability of native invertebrate
prey for fish—particularly mayflies, caddis flies, and
chironomids. They are not a viable food sources
themselves because their hard shell allows them to
pass through a fish gut unharmed.
Current Status in Colorado (See Map):
Known populations have been mapped and are being
monitored for long‐term impacts. There are no viable
control methods.

New Zealand Mudsnail Distribution for 2020

Chapter 3: Other ANS Biology

33

© photo by michigan department of environmental quality

New Zealand Mudsnail
(Potamopyrgus antipodarum)

�© photo by michigan department of environmental quality

Rusty Crayfish
(Faxonius rusticus or
Orconectes rusticus)
Rusty crayfish are native to the Ohio River
Basin. They were first discovered outside
of their native range in the 1960s.
Identification: Rusty crayfish grow up to
five inches long. They have brown bodies
and large grayish‐green to reddish‐brown
claws with dark black bands on the tips.
There are two rusty patches on either side
of the crayfish’s body. The claws, when closed, have an
oval gap in the middle. The moveable claw is smooth
and S‐ shaped. Males tend to be larger than females.
Habitat: Found in freshwater lakes, rivers, and
streams. Prefer deep pools and fast currents with
cover from predators.
Pathway of Introduction and Spread: Introduced by
anglers who use the crayfish as bait and throw unused
bait into the water and illegally stocked as a prey base
for a fishery. Although they are often introduced
as bait, they do not make good bait due to their
aggressive nature.

Impacts: Rusty crayfish eat small fish, insects, and
fish eggs. They also eat aquatic vegetation, damaging
underwater habitat that is important for fish
spawning, cover, and food. They are aggressive and
displace native crayfish.
Current Status in Colorado (See Map):
Rusty crayfish was first detected in Colorado in the
Yampa River and Catamount Reservoir in 2009,
in Sanchez State Wildlife Area in 2010, and in
Stagecoach Reservoir State Park in 2011. Populations
have been controlled through mechanical and
physical harvesting.

Rusty Crayfish Distribution for 2020

34

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

© www.mdinvasivesp.org

�Eurasian Watermilfoil
(Myriophyllum spicatum)
Eurasian watermilfoil is native to Europe, Asia, and
northern Africa. It was once commonly sold as an
aquarium plant and was introduced to the eastern U.S.
at least as long ago as the 1940s, but it may have arrived
as early as the late 1800s.
Identification: Eurasian watermilfoil is a submerged,
rooted perennial with long, branching stems and soft
feathery leaves attached in whorls of four. Each leaf
has 12 to 21 pairs of leaflets, which are closely spaced,
and about 1⁄2 inch long. Eurasian watermilfoil produces
small yellow, four‐parted flowers on a spike that
projects two to four inches above the water surface.
Habitat: Tolerates a wide range of water conditions
and depths; prefers nutrient‐rich substrate.
Pathway of Introduction and Spread: Eurasian
watermilfoil reproduces by seeds, fragmentation,
and winter buds. Fragmentation and winter buds are
believed to be more important in spreading the plant.
Any plant fragment can start a new infestation. Winter
buds are tight leaf clusters that break off and fall to the
bottom, where they overwinter. In the spring, the buds
grow and form new plants.
Impacts: Eurasian
watermilfoil forms dense
mats that restrict swimming,
fishing, and boating, and clog
water intakes. The mats alters
water chemistry by choking and
shading out other native aquatic
plants. The decaying plants

decrease oxygen levels in the water and foul lakeside
beaches. This disrupts the food chain and destroys
habitat and food needed by fish and birds. Eurasian
watermilfoil slows the flow of water in irrigation
ditches and canals and creates standing water that is
ideal mosquito habitat.
Current Status in Colorado (See Map):
EWM was first documented in the Rio Grande River
in the late 1990’s, in the City of Westminster in 1999,
and Boulder Creek in 2004. Since that time, EWM has
spread throughout much of the South Platte, Arkansas,
and Rio Grande River Basins. EWM is also known to
Navajo Reservoir. Unfortunately, EWM is detected in
new locations almost every year.

Eurasian Watermilfoil Distribution for 2020

Chapter 3: Other ANS Biology

35

�Brazilian egeria’s native range includes some of the
regions of Brazil to coastal areas of Argentina and
Uruguay. It was initially introduced by the aquarium
and water garden industry. It was sold for its
oxygenation capabilities and for its attractive flowers.
It currently is the top-selling aquatic plant for use
in aquaria and has been sold under several names
including egeria, oxygenating plant, and anacharis.
Identification: Brazilian elodea is a submerged
perennial that can reach lengths of six feet. This
plant can live rooted or free floating at depths of up
to 20 feet. It has bright green leaves in whorls of four
around each node on the stem. Each leaf is up to
11⁄4 inches long with a linear oblong shape and the
margins of the leaf are very finely toothed, visible only
with a hand lens. The flowers of Brazilian egeria have
three white petals and three green sepals. The flowers
emerge above the water on long stalks. Brazilian
egeria is easily confused with another exotic weed,
Hydrilla (Hydrilla verticillata). Hydrilla will have
rough teeth on the underside of the leaves where
Brazilian egeria will not.

Habitat: Found
in freshwater
lakes, rivers, and
streams. Prefer
deep pools and
fast currents
with cover from
predators.
Pathway of
Introduction
and Spread:
Fragmented
pieces of
Brazilian egeria
that have double
nodes can
produce a new
plant. It has
been found as a contaminant in nursery stock. It is
extensively sold in the aquarium industry. If people
dispose of these plants into open water, it can create
a new infestation. Boaters, anglers, and other water
recreationists can transport fragments from one body
of water to another.

Impacts: Brazilian egeria creates dense mats that
crowd out native plants. Mats can impede boating,
fishing, swimming, and other aquatic recreation
activities. The mats are
Brazilian Egeria Distribution for 2020
unsightly, restrict water
movement, trap sediment,
impair water quality, and
degrade fish habitat. The
fragmented pieces can clog
water intake pipes and other
water delivery infrastructure.
Current Status in Colorado
(See Map):
Brazilian egeria is a relatively
new species to Colorado
and is known to only three
locations: Jefferson Lake,
Spinney Mountain Reservoir,
and the Metro Wastewater
Reclamation District’s North
Treatment Ponds in Brighton,
Colorado.

36

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

© Virginia Tech Weed ID Guide

Brazilian egeria
(Egeria densa)

�List of WID Stations with Known ANS
WID Location (alphabetical order)

ANS Present

Arvada Reservoir

Eurasian Watermilfoil

Chatfield Reservoir

NZMS, Eurasian Watermilfoil

Cherry Creek Reservoir

Hybrid Eurasian Watermilfoil

Elevenmile Reservoir

NZMS, Eurasian Watermilfoil

Green Mountain Reservoir

Quagga Mussel (SUSPECT)

Lathrop State Park (Horseshoe &amp; Martin Reservoirs)

Eurasian Watermilfoil

Navajo Reservoir

Eurasian Watermilfoil

Pueblo Reservoir

Eurasian Watermilfoil

Spinney Mountain Reservoir

NZMS, Eurasian Watermilfoil, Brazilian egeria

Stagecoach Reservoir

Rusty Crayfish

Standley Lake

Eurasian Watermilfoil

Trinidad Lake

NZMS

All ANS Distribution for 2020

Chapter 3: Other ANS Biology

37

�Chapter 3 Review Questions
1. The Asian Clam is a look‐a‐like invasive species that is fairly common in Colorado.
What are two characteristics that make it different than ZQM?
1.) ____________________________________________________________________________________
2.) ____________________________________________________________________________________
2. Which group lists other ANS of concern for transportation overland on recreational watercraft?
a. Northern Pike, Rainbow Trout, Pondweed, Brown Trout
b. Eurasian watermilfoil, Rusty Crayfish, New Zealand Mudsnails
c. Boreal Toad, Round Goby, Rusty Crayfish, Arkansas River Darter
d. Northern watermilfoil, Bullfrog, Boreal Toad, Purple Loosestrife
3. Where is the transportation of live crayfish prohibited?
______________________________________________________________________________________
______________________________________________________________________________________
4. List ways that people commonly spread New Zealand mudsnails.
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
5. Which location is positive for New Zealand Mudsnails?
a. Vallecito Reservoir
b. Navajo Reservoir
c. Trinidad Lake
d. Jackson Lake
6. Rusty Crayfish make good prey for fish.  (circle one)   True  or  False
7. Eurasian watermilfoil _________________ can spread on boats and infest new waters—which is why it’s
important that boats leaving EWM positive waters get inspected and don’t transport plant parts.
8. This aquatic invasive plant was recently detected in Colorado and has a white flower on an elongated stalk.
______________________________________________________________________________________

38

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�C O L O R A D O

P A R K S

&amp;

W I L D L I F E

Chapter 4
Watercraft 101

cpw.state.co.us
Chapter 4: Watercraft 101

39

��Chapter 4: Watercraft 101
Boat Terminology
The following definitions
are the most common terms
you will need to know as an
inspector.
aft—A nautical term that
refers to the rear or
stern of the boat.
anchor storage—An
interior compartment
area on the boat,
typically in the bow of
the boat, where the anchor is stored.
bait well—An interior compartment that
specifically holds live aquatic bait. Sometimes
it is a separate container on the boat or
incorporated in the live well compartment.
May also be a pull out bucket.
ballast tank—A compartment within a boat, ship
or other floating structure that holds water.
Adding water (ballast) to a vessel lowers its
center of gravity and increases the draft of the
vessel. A ballast tank can be filled or emptied
in order to adjust the amount of ballast force.
Small sailboats designed to be lightweight for
being pulled behind automobiles on trailers
are often designed with ballast tanks that can
be emptied when the boat is removed from the
lake or reservoir.
bilge—The lowest compartment on a boat where
the two sides meet at the keel. The word is
sometimes also
used to describe
the water that
collects in this
compartment.
Water that does
not drain off the
side of the deck
drains down
through the boat
into the bilge.

bilge plug—A plug located either on the transom
wall or in the bottom of the hull that keeps
lake water from entering the boat. It must be
removed when exiting the water body.
bilge pump—A water pump used to remove
excessive bilge water. The water that collects in
the bilge must be pumped out to prevent the
bilge from becoming too full and threatening
to sink the boat on the lake or reservoir.
bow—A nautical term that refers to the forward
part of the hull of a boat.
cavitation plate—A flat metal fitting mounted
horizontally above the propeller of an
outboard motor, which helps direct the flow of
water into the propeller and reduces cavitation.
Cavitation is the effect caused when air is
drawn down into the water by a propeller,
resulting in loss of power, overspending of the
engine and propeller, and pitting of the metal
surfaces of the propeller.
centerboard—A retractable keel which pivots out
of a slot in the hull of a sailboat, known as a
centerboard trunk. A centerboard is used to
provide lift to counter the lateral force from
the sails.
complex boat—A boat that has one or more
interior compartments or a closed hull or
more than one motor.

Chapter 4: Watercraft 101

41

�daggerboard—A retractable keel used by various
sailing craft. While other types of centerboard
may pivot to retract, a daggerboard slides in a
casing. The shape of the daggerboard converts
the forward motion into a windward lift,
countering the leeward push of the sail.
fish box—An interior compartment in a boat
where fish are kept.
gimbal—A pivoted support that allows the
rotation (up and down and side to side
movement) of the outdrive of an I/O engine
and outboard motor.
hull—The body or frame of a boat.
inboard engine—A marine propulsion system
enclosed within the hull of the boat.
inboard/outboard engine—(I/O) is located
inboard just forward of the transom (stern)
and provides power to
© WWW.BOATPARTSTORE.COM
the drive unit located
outside the hull.

jet boat—A boat propelled by a jet of water ejected
from the back of the craft. A jet boat draws the
water from under the boat into a pump inside
the boat, and then expels it through a nozzle at
the stern.
keel—Runs in the middle of the boat, from the
bow to the stern, and serves as the foundation
or spine of the structure, providing the major
source of structural strength of the hull. Keels
are different from centerboards and other
types of foils in that keels are made of heavy
materials to provide ballast to stabilize the
boat. Keels may be fixed, or non-movable or
they may retract to allow sailing in shallow
waters.
live well—An interior compartment found on
many fishing boats that is used to keep caught
fish alive. It works by pumping fresh water
from the water body into the tank, as well as
keeping the water aerated.
live well pump—A pump that assists in filling a
live well with lake water.
lower unit—The bottom portion of an outboard
motor or an inboard/outboard engine. The
water found in this portion is lake water that
has not been heated by the motor/engine.

This drive unit
(or lower unit or
outdrive) resembles
the bottom half of an
outboard motor.
© WEN BALDWIN

42

macerator pumps—Pumps designed to empty
holding tanks when fitted onto the plumbing
in boats. The function of the pump is to
suction the solids and liquids from the lines
connected to the holding tanks and grind the
effluent with the rotating cutter head down to
a small particle size and discharge the waste.
outboard motor—A propulsion system for
boats, consisting of a self-contained unit that
includes engine, gearbox, and propeller. It is
designed to be affixed to the outside of the

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�transom and is the most common motorized
method of propelling small watercraft. As well
as providing propulsion, outboards provide
steering control, as they are designed to pivot
over the gimbal (mounting bracket) and control
the direction of the thrust. The skeg also acts as
a rudder when the engine is not running.

sailboat—A boat propelled partially or wholly
by sail.
sea strainer—A filtration
device used to prevent
solids from reaching
internal compartments,
such as pumps on engines
or ballast tanks.
simple boat—A boat with
an open hull, no
containers or
compartments and
a single outboard
motor.
skeg—A support at the
bottom of a rudder.
starboard—A nautical term that refers to the right
side of the boat as perceived by a person who
is in the boat facing the bow.

© STATE OF COLORADO
IDS DESIGN

pitot tube—A pressure measurement instrument
used to measure the velocity of a boat at a
given point and is usually attached to the
transom.
port—A nautical term that refers to the left side of
the boat as perceived by a person who is in the
boat facing the bow.
PWC—Personal Water
Craft: A recreational
watercraft that the
user sits or stands
on, rather than
inside of, as in a
boat. Models have
© florida marine guide
an inboard engine
driving a jet pump that has a screw-shaped
impeller to create thrust for propulsion and
steering.
rudder—A device used to steer a boat when
moving through water. A rudder operates
by redirecting
water that has
passed the hull,
imparting a
turning motion
to the craft.

stern—The rear or aft-most part of a boat.
transducer—An instrument that projects a sound
wave into the water. When the wave strikes
something such as a fish, it is reflected back
and displays size, composition, and shape of
the object on a screen inside the boat.
transom—The surface that forms the flat back
panel of the stern of a boat.
transom well—A recessed area where water
collects that is formed by the transom. Good
examples of this include the stern of a pontoon
boat or the area where an outboard motor is
attached.
trim tabs—The small surfaces (shelves) that are
connected to the transom on a boat mostly
found on cruisers, sport fishing boats, and
center console boats ranging from 20 feet
and up.

© boatcourse.com

Chapter 4: Watercraft 101

43

�Marine Propulsion Systems
The purpose of this section is to inform the boat
inspector about the propulsion systems that are used
to power watercraft. There are electric and gas trolling
motors, outboard motors, inboard/outboard engines
(I/O), inboard engines, and jet drives in jet boats
and PWCs.
Trolling Motors
An electric trolling motor is a
marine propulsion system consisting
of a self-contained unit that includes
an electric motor, propeller and
controls, and is affixed to a boat,
either at the bow or stern.

Gasoline
Trolling Motor

Electric
Trolling Motor

© wikipedia

44

A gasoline-powered outboard, if it is not the vessel’s
primary source of propulsion, may also be referred to
as a gasoline trolling motor. Small outboard motors
are frequently used as trolling motors on boats with
much larger engines that do not operate as efficiently
or quietly at trolling speeds. These typically are
designed with a manual pull start system, throttle, and
gearshift controls mounted on the body of the motor,
and a tiller
for steering.
Trolling
motors
are often lifted
from the water
to reduce
drag when the
boat’s primary
engine is in
operation.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�As shown in the first photo, the intakes on some of
the gas trolling motors are underneath the cavitation
plate. Others are so close to the edge that most
muffs do not cover them in order to perform a
decontamination, as shown
in the second photo.

Outboard Motors
An outboard motor is a marine
propulsion system, consisting of a
self-contained unit that includes engine,
gearbox, and propeller, designed to be
affixed to the outside of the transom.
This is the most common motorized
method of propelling small watercraft.
As well as providing propulsion,
outboards provide steering control,
as they are designed to pivot over the
gimbal (mounting bracket) and control
the direction of the thrust. The skeg also
acts as a rudder when the engine is not
running.

The intakes on this Evinrude outboard motor are only
on one side and are shown as the small rectangle.

Chapter 4: Watercraft 101

45

�Gasoline
Trolling Motor

This photo shows an outboard
motor on a pontoon boat with
a back up gas trolling motor.

Outboard Motor
Inboard/Outboard Engines
An inboard/outboard (I/O)
engine is located inboard just
forward of the transom (stern)
and provides power to the drive
unit located outside the hull.
This drive unit (or lower unit or
outdrive) resembles the bottom
half of an outboard motor.

© WEN BALDWIN

The following diagram demonstrates that after an I/O
has exited the lake or reservoir there is water in the
hose from the water inlet to the engine circulating
pump. When the engine is started in another water
body, this water goes through the “cold” engine and is
expelled into the water. If this water is from
a positive reservoir the chance of live
veligers being present in the
water is very high.

© WWW.BOATPARTSTORE.COM

46

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Inboard Engines
An inboard engine is a marine propulsion system
enclosed within the hull of the boat. Inboard engines
have a raw water cooling system where water from
the reservoir is pumped by the engine to cool it.
Attached to the hull of the boat is the propeller shaft
and propeller which propels the boat through the
water. The rudder acts as the “steering wheel” to guide
the boat.
© boatcourse.com

After opening the
inboard engine
compartment, the
bilge area around
the engine can be
inspected and/or
decontaminated
for standing water.

Closed Cooling System Water Flow
(Closed Cooled Models)—This diagram shows how
water from the reservoir/lake is circulated
throughout the engine. As with the I/O,
when the boat is exiting the water
body, water is left in this system
and is expelled into the next
water body.

© WWW.JUSTANSWER.COM

a
b
c
d
e
f
g
h
i
j
k
l

Exhaust Elbow
Exhaust Manifold
Water Pump
Heat Exchanger
Water Circulating Pump
Thermostat Housing
Water Distribution Housing
Cool Fuel Box
Check Valve
Power Steering Cooler
Flush Fitting (Inboard Models)
Flush Connection (Inboard
Models)
m Shaft Log Seal Connection Point

Chapter 4: Watercraft 101

47

�Jet Boat
A jet boat is a boat propelled by a jet of water ejected
from the back of the craft. Unlike a powerboat or
motorboat that uses a propeller in the water below
or behind the boat, a jet boat draws the water from
under the boat into a pump inside the boat. The water
then passes through a series of impellers and stators—
known as stages—which increase the velocity of
the water flow. The water is then expelled through a
nozzle at the stern. Most modern jets are single stage
while older waterjets may have as many as three
stages. The tail section of the waterjet unit extends out

© WESTWINN GROUP CORP.

through the transom of the hull above the waterline.
This jet stream exits through a small nozzle at high
velocity to push the boat forward.

Fill in the blanks with the correct boat terminology

1

2
3

6
8

4
7

48

5

1. ____________________________________

5. ____________________________________

2. ____________________________________

6. ____________________________________

3. ____________________________________

7. ____________________________________

4 . ____________________________________

8 . ____________________________________

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�1

1

8

6

2

1

3
2

7

3

5

5

6

4
1. ____________________________________
5
2. ____________________________________

2

4

4

7

3

5. ____________________________________

8

6. ____________________________________

3. ____________________________________

7. ____________________________________

4 . ____________________________________

8 . (engine type)_________________________

1.
2. (engine type)

6

3.

1

4.
1.

2

5.

2. (engine type)
3.

3

7.

4.

8.
13

4

5

6.

7

8

Chapter 4: Watercraft 101
1.

5.

49

�Watercraft Risk Assessment
There are three main categories of boats:
Regulation Exempt Boats
• Does not need to be inspected unless they launch
from a trailer or have an engine or motor.

Simple Boats
• Must be inspected.
• A boat with an open hull and no containers and
compartments and a single outboard motor.

Which Watercraft are Exempt from Mandatory
Inspections?
Regardless of exemption, try to educate all boaters and
recreationists about ANS. All watercraft are required to
be clean, drained, and dry in between uses.
The following 10 types of watercraft are exempt from
inspection in Parks Chapter 8 Regulation #800K.
These are the only watercraft in Colorado that are
exempt from the mandatory inspection law and
regulations. All others must be inspected.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.

Kayak
Canoe
Raft
Belly Boat
Windsurfer Board
Sailboard
Float Tubes
Inner Tubes
Paddleboard
Foldable Plastic Boat

Marine propulsion systems must be inspected
regardless of the type of motor, engine, or watercraft.
They are not exempt.
Any trailer that goes into the water must be inspected.
Trailers are only exempt when they do not enter water
and the watercraft on top of the trailer is one of the
exempt hand-launched and hand-powered watercraft
listed above.

Complex Boats
• Must be inspected.
• A boat that has one or more interior
compartments or a closed hull or more than
one motor or engine.

50

What are the reasons for exempting the above
10 types of watercraft from inspection?
1. Hand-launched and hand-powered.
2. Does not have a marine propulsion system.
3. Typically do not have interior water holding
compartments.
4. Typically do not stay on the water long = short
exposure time.
5. Typically do not stay still on the water = short
exposure time.
6. Typically do not anchor or make contact with lake
or reservoir bottom.
7. Typically fully dried out before putting in a car or
on top of a car for transport.
8. Provides a low-risk access option for boaters and
anglers when inspections aren’t present and boat
ramps are closed.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Which Watercraft Must be Inspected?
If the watercraft is not one of the ten hand-launched
and hand-powered exempt boats, it must be
inspected. All motors and engines must be inspected.
Any trailer that enters the water must be inspected.
Where Do We Look?
H.E.A.D. is an acronym that can help you remember
where to look for mussels on boats during entrance
and exit inspections.
H
E
A
D

=
=
=
=

Hull and Trailer
Engine or Motor (including Transom)
Anchor, Anchor Rope, and Equipment
Drain Interior Compartments

Watercraft Type

Risk Level

House Boats, Cabin Cruisers,
Ski Boats, and Wakeboard Boats
with Ballast Tanks

Very High
Biological Risk

Large Open Boats, Sailboats, Ski Boats, High Biological
Wakeboard Boats with no ballast
Risk
tanks, and Personal Watercraft (PWC)
Simple Boats—Open Hull, Single
Motors, No Interior Containers
or Compartments

Medium
Biological Risk

(#800K) Exempt Watercraft: Canoe,
Kayak, Windsurfer Board, Sail Board,
Belly Boats, Rafts, Float Tubes, and
Inner Tubes

Low Biological
Risk

Outdoor Session—Boat Anatomy
Anchor and
Equipment

Interior
Compartments

Engine

Hull

Drain Plug
Trailer

Chapter 4: Watercraft 101

51

�Boat Type
Administration/Agency Boat
Exempt Boat
Cabin Cruiser
Fishing Boat

Name That
Boat Game

House Boat
Hunter
Jon Boat
Other

Near each photograph:

Personal Watercraft
Pontoon

A. Circle if the watercraft is exempt, simple, or complex.

Sail Boat
Simple Boat

B. Circle the type of marine propulsion system.

Ski Boat

C. Label the Boat Type using the key to the right.

52

Wakeboard Boat

1A.

Exempt

Simple

1B.

Outboard

I/O

1C.

Boat Type: __________________________

2A.

Exempt

Simple

2B.

Outboard

I/O

2C.

Boat Type: __________________________

3A.

Exempt

Simple

3B.

Outboard

I/O

3C.

Boat Type: __________________________

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

Complex
Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Jet

�4A.

Exempt

Simple

Complex

4B.

Outboard

I/O

4C.

Boat Type: __________________________

5A.

Exempt

Simple

5B.

Outboard

I/O

5C.

Boat Type: __________________________

6A.

Exempt

Simple

6B.

Outboard

I/O

6C.

Boat Type: __________________________

7A.

Exempt

Simple

7B.

Outboard

I/O

7C.

Boat Type: __________________________

8A.

Exempt

Simple

8B.

Outboard

I/O

8C.

Boat Type: __________________________

Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Chapter 4: Watercraft 101

Jet

53

�54

9A.

Exempt

Simple

9B.

Outboard

I/O

9C.

Boat Type: __________________________

10A.

Exempt

Simple

10B.

Outboard

I/O

10C.

Boat Type: __________________________

11A.

Exempt

Simple

11B.

Outboard

I/O

11C.

Boat Type: __________________________

12A.

Exempt

Simple

12B.

Outboard

I/O

12C.

Boat Type: __________________________

13A.

Exempt

Simple

13B.

Outboard

I/O

13C.

Boat Type: __________________________

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

Complex
Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Jet

�14A.

Exempt

Simple

Complex

14B.

Outboard

I/O

14C.

Boat Type: __________________________

15A.

Exempt

Simple

15B.

Outboard

I/O

15C.

Boat Type: __________________________

16A.

Exempt

Simple

16B.

Outboard

I/O

16C.

Boat Type: __________________________

17A.

Exempt

Simple

17B.

Outboard

I/O

17C.

Boat Type: __________________________

18A.

Exempt

Simple

18B.

Outboard

I/O

18C.

Boat Type: __________________________

Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Jet

Complex
Inboard

Chapter 4: Watercraft 101

Jet

55

�Chapter 4 Review Questions
1. List the ten watercraft exempt from mandatory inspections in Colorado.
1.)______________________________________
6.) ______________________________________
2.)______________________________________
7.) ______________________________________
3.)______________________________________
8.) ______________________________________
4.)______________________________________
9.) ______________________________________
5.)______________________________________
10.) _____________________________________
2. List three reasons why they are exempt from inspections.
1.) ___________________________________________________________________________________
2.) ___________________________________________________________________________________
3.) ___________________________________________________________________________________
3. Why are ballast tanks a big deal for inspection and decontamination?
______________________________________________________________________________________
4. Circle the one item you need to inspect on a sailboat that is different from other boats.
a. Hull and Trailer
b. Centerboard Box
c. Rudder
d. Motor
5. Match the watercraft type with the appropriate risk level.
Watercraft Type
		 Risk Level
a. Low Biological Risk
	���� House Boats, Cabin Cruisers, Ski Boats and
Wakeboard Boats with Ballast Tanks.
b. Medium Biological Risk
c. High Biological Risk
d. Very High Biological Risk

	���� Large Open Boats, Sailboats, Ski Boats
and Wakeboard Boats with no ballast tanks,
Personal Watercraft (PWC).
	���� Simple Boats—Open Hull, Single Motors,
No Interior Containers or Compartments.
	���� Canoe, Kayak, Windsurfer Board,
Sail Board, Belly Boats, Rafts, Float Tubes,
and Inner Tubes.

56

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�6. Match the definition to the engine or motor:
		 Engine or Motor
Definition
a. Inboard/Outboard Engine
	���� A marine propulsion system consisting of a self‐contained unit
that includes a motor, propeller and controls, and is affixed to an
b. Outboard
angler’s boat, either at the bow or stern. Typically electric but also
c. Trolling Motor
gas powered.
d. Inboard Engine
	���� Enclosed within the hull of the boat. These have a raw water
e. Jet Engine
cooling system where water from the reservoir is pumped by the
engine to cool it. Attached to the hull of the boat is the propeller
shaft and propeller which propels the boat through the water. The
rudder acts as the “steering wheel” to guide the boat.
	���� Located just forward of the transom (stern) and provides power to
the drive unit located outside the hull. This drive unit (or lower unit
or outdrive) resembles the bottom half of an outboard motor.
	���� This propulsion system draws the water from under the boat into
a pump inside the boat. The water then passes through a series
of impellers and stators—known as stages—which increase the
velocity of the water flow. The water is then expelled through a
nozzle at the stern. The tail section of the unit extends out through
the transom of the hull above the waterline. This water stream exits
through a small nozzle at high velocity to push the boat forward.
	���� A marine propulsion system for boats, consisting of a self‐
contained unit that includes engine, gearbox, and propeller,
designed to be affixed to the outside of the transom and is the most
common motorized method of propelling small watercraft. As well
as providing propulsion, these provide steering control, as they are
designed to pivot over the gimbal (mounting bracket) and control
the direction of the thrust. The skeg also acts as a rudder when the
engine is not running.
7. Which compartments cannot be fully drained on a watercraft? (circle all that apply).
a. Ballast Tank or Bag
b. Inboard Engine
c. Inboard/Outboard Engine
d. Outboard Engine
e. Bait Well
f. All of the above
8. What boats require inspection? (circle all that apply).
a. Hand-launched and hand-powered canoe or kayak.
b. Boats with an electric, gas, or diesel motor.
c. Boats that launch from a trailer.
d. Jet Skis or other Personal Watercraft
Chapter 4: Watercraft 101

57

�Notes
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________

58

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�C O L O R A D O

P A R K S

&amp;

W I L D L I F E

Chapter 5
Watercraft Inspection
Procedures

cpw.state.co.us
Chapter 5: Watercraft Inspection Procedures

59

��Chapter 5: Watercraft Inspection Procedures
The Ideal Inspector
What characteristics, traits, or qualities make up the Ideal Inspector?
1. ______________________________________________________________________________________
2. ______________________________________________________________________________________
3. ______________________________________________________________________________________
4. ______________________________________________________________________________________
5. ______________________________________________________________________________________
6. ______________________________________________________________________________________
7. ______________________________________________________________________________________
8. ______________________________________________________________________________________
9. ______________________________________________________________________________________
10. ______________________________________________________________________________________
11. ______________________________________________________________________________________
12. ______________________________________________________________________________________
13. ______________________________________________________________________________________
14. ______________________________________________________________________________________
15. ______________________________________________________________________________________
16. ______________________________________________________________________________________
17. ______________________________________________________________________________________
18. ______________________________________________________________________________________

Chapter 5: Watercraft Inspection Procedures

61

�Inspector Roles, Expectations,
and Guidance
The Role of the Authorized Agent (Inspector)
1. Inspect Watercraft for ANS.
2. Decontaminate Watercraft for ANS.
3. Educate and Inform the Public about ANS.
The inspector’s role is to teach boat operators to
inspect their own watercraft each time they launch
and to ensure it is clean, drained, and dry in between
every use.
Expectations
• Wear Uniforms and Appropriate Clothing/PPE.
• Show up on time or early for your shift.
• Send a rumor mill to supervisors or to the
ANS Program Office.
• Stick to the talking points—learn the Boater’s
Brochure!
• Smile!
Unless otherwise instructed by their supervisors to
do so, Inspectors should NOT do the following:
• Law Enforcement
• Campground Management
• Search and Rescue
• Fishing License checks
• Post Signage
• Manipulate the land in any way
• Boater Safety Checks
• Boat Registration Checks
• Bathroom cleaning
• Fee collections
What is NOT allowed in the workplace?
• Pets
• Sleeping on the Job
• Leaving the Ramp Unattended
• Marijuana, Drugs, or Alcohol of any kind
• Violence
• Smoking while Boaters/Visitors are Present
• Concealed weapons (even with permit)

62

Inspector Guidance
Equipment is for use at the inspection station, by
employees for inspection and decontamination only.
• Report broken or missing equipment to your
crew leader or supervisor.
• Do not remove equipment from the site.
• Do not use state equipment for any purpose other
than what it was intended by your employer.
• Do not charge for inspection or decon.
• Do not accept $ tips.
• Do not attempt to sell CPW or Authorized
Location equipment.
• Return all equipment at the end of the season.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�What Are The Mandatory Inspection Laws
and Regulations in Colorado?
Resident Boaters must pass a state-certified watercraft
inspection if:
• The watercraft has launched out of state.
• The watercraft has launched on any of the
Colorado lakes or reservoirs where ANS have
been detected. The boat operator must submit the
watercraft to an inspection prior to leaving.
• The watercraft is being launched in a lake or
reservoir where inspections are required prior to
entry. Boaters should expect their watercraft to be
inspected at any lake or reservoir in the state.
Out-of-State boats must pass a state-certified
inspection and/or decontamination before launching
the watercraft in any Colorado lake, reservoir,
or waterway.

The Goal for Every Boat:
Clean, Drain, Dry in between each
and every use!
No Water. No Animals/Mussels.
No Plants. No Mud.

Types of WID Stations
Negative Prevention Waters—Waters that have never
had a verified detection of any ANS or have not had a
detection within the time frame for de‐listing.
Other ANS Containment Water—Waters that
are positive for an Other ANS. They have a verified
presence of an ANS listed in Parks Chapter 8
regulations other than zebra or quagga mussels.
Most ANS Positive waters are also prevention waters
for mussels and other ANS.
ZQM Containment Water—Waters that have had a
verified zebra or quagga mussel detection.
Off Water WIDS—Authorized locations that are
not located at a water body (e.g. offices or business
locations).

What Are the Priorities
As a Watercraft Inspector?
1. Ensure Personal and Public Safety—The safety
and the safety of the public is top priority at all
times. Many vehicles and boats will be moving
around the inspection area. People will be looking
under wheels and through the watercraft. You will
need to ensure the safety of all involved.
2. Educate Boaters—Every contact made with
boaters is an educational opportunity to teach
them about the importance of controlling zebra
and quagga mussels and other ANS. Boaters must
realize that ANS are spread by their actions (or
inaction). They must understand that they can
lose access and their recreational opportunities
if they do not help in this effort. The primary
education message is Clean, Drain, and Dry:
Clean: Remove all plants, animals, and mud.
Thoroughly wash everything.
Drain: Drain every space or item that can
hold water. Remove all water drain plugs.
Dry: Make sure the watercraft is completely
dry which means sponging, toweling or
pumping all water out.
3. Inspecting Watercraft—Assessing the Risk of
the Watercraft—By following the inspection
procedure detailed later in this chapter, inspectors
are ensuring that the biological risk of the
watercraft is reduced prior to launching and that
watercraft are leaving clean, drained, and dry
before exiting.
4. Draining Standing Water—Colorado’s WID
procedures are largely based on mitigating the
risks associated with transporting organisms from
one water body to another in standing water.
These organisms (e.g. mussel veligers, pathogens
or plant fragments) are typically microscopic so
it is essential that standing water be drained in
between each and every use.
5. Decontamination—If there is a known or
suspect ANS on a watercraft, or standing water
that can not be drained, the watercraft must be
decontaminated. See Chapter 6.

Chapter 5: Watercraft Inspection Procedures

63

�What Are The Types of Inspections?
These procedures have been proven effective in
identification and interception of watercraft that have
zebra or quagga mussels, New Zealand mudsnails,
rusty crayfish, and noxious weeds. Following these
protocols and educating the boater WILL prevent the
spread of ANS.
There are four inspection protocols that will be
described in detail later in the Chapter.
1. Entrance Inspection: This inspection procedure
applies to all trailered, motorized watercraft
before entering prevention or containment water
bodies.
2. Exit Inspection—Negative and Other ANS
Containment: This procedure is for boats leaving
a negative or other ANS positive reservoir.
This inspection ensures that contact has been
made with the boater before they leave the boat
ramp and verifies that the watercraft is clean
and drained prior to exiting. Make sure the
boater pulls all plugs, removes plants, checks sea
strainers, drains all water, and wells are empty.
3. Exit Inspection—ZQM Containment: This
procedure is for boats leaving lakes or reservoirs
that are listed as suspect, positive, or infested
for zebra or quagga mussels. Upon exiting,
the inspector performs a full inspection and
decontaminates those that can’t be drained and
are going to a different water body next.

64

4. Off Water Inspection: These inspections are
mostly performed at offices and businesses that
are not located at a water body. They could,
however, be performed at a water body for
someone needing a seal but not intending to
launch at that location next. This is a hybrid
entrance‐exit inspection, which follows the
entrance inspection procedure and ends with a
seal application.
What Equipment Do I Need?
A designated inspection area should have been
identified, with signage identifying its location.
Every inspector should have the following items when
performing inspections:
•
•
•
•
•
•
•
•
•

Uniform and Safety Vest
Tablet for Data Collection
Educational Materials
L.E.D. Flashlight
Mirror
Magnifier
Wire Cutter
Digital Camera
Sample Collection Kit

Supervisors will need to be sure the equipment and
materials on the following page are available.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Safety Equipment
q Traffic cones
q Orange traffic safety vests
q Mandatory Uniforms
q Chocks for the trailer (optional)
q Rolling stepladder for boat access (optional)
q First Aid Kit
(For use by first aid trained staff only. If not
first aid trained, use only on self—not for use on
anyone else or members of the public.)
q Personal Protective Equipment (PPE)— refers
to protective clothing such as closed toe shoes,
gloves, hats, sun protection, sunscreen, eye
protection, insect protection, bugscreen, water
proof suit, etc.

Inspection Equipment
q WID Activity Log Form or Data Collector
q State of Colorado Forms and Checklists
q Green seals, wire, and seal receipts
q Wire cutters
q Crescent wrench to take out bilge plugs
(9⁄16” socket also handy to give boater if they need
it. Inspectors—don’t use tools on other’s boats.)
q Digital camera
q Hand wipes
q Hand sanitizer
q Paper towels
q Inspection mirrors
q Flashlights
q Magnifying glass
q Sample collection kit
q Work lights
q Method of communication
(Radio, cell phone, etc.)
q Weather radio
q Clipboards
q Pens/pencils
q Vise grips
q Buckets
q Nets
q Bilge pump
Staff Equipment
q Uniforms
(shirts, vests, name tags, hats, etc.)
q Chairs
q Access to drinking water
q Access to restrooms
q Access to shelter in case of weather
q Sun block
q Trash can
Educational Materials
q Mussel education brochures
q Boating regulation brochures
q Fishing regulation brochures
q Maps of reservoir/lake/etc.

Chapter 5: Watercraft Inspection Procedures

65

�Seals and Receipts
Overview of the ANS Wire Seals
and Receipts
A critical step in the entrance inspection procedure
is to check for a seal and verify the receipt. The last
step in the exit inspection procedure is to apply
a seal and receipt. Therefore, it is very important
that inspectors understand the seal system before
learning the full inspection procedures.
What is the green seal system?
Colorado uses a wire seal,
coupled with a receipt, to
communicate the location
of the boat’s last inspection or
decontamination and associated information
to the next inspector. The seal locks the
watercraft to the trailer indicating that it has not
launched since the seal was issued. The receipt
accompanies the seal and provides documentation
regarding date and location of last inspection,
protocol used, type of decontamination, if any, and
other important information.
It is imperative that you understand exactly how these
seals are used and what they tell you about the risk
level of that watercraft.
When Do Boats Get a Green Seal and Receipt?
A. If a watercraft leaves a water body and passes an
exit inspection or decontamination.
B. If a watercraft comes to an office or business
WIDS and passes an off‐water inspection or
decontamination.
Where Are Green Seals Applied?
The seal must be attached in a way that ensures it
will be broken if the watercraft is separated from
the trailer. Typically, the wire seal goes between
the eyebolt and a hard welded part of the trailer.
Be advised that some winches can be unrolled
completely and separated from the seal without
breaking.
Note: The inspector must physically and
visually inspect the seal itself to make sure it
has not been tampered with.
66

Exit Inspection with Seal Application Goals
for WID Sites = 100%
All WID Stations should strive to provide seals
and receipts to all boaters exiting their sites.

•
•

Minimum Requirements for WID
Exit Inspections:
• Prevention/Negative sites with pre-inspection
must provide exit inspections with seals and
receipts to at least 80% of boaters
• Prevention/Negative sites without preinspection must provide exit inspections with
seals and receipts to at least 90% of boaters.
Other ANS Containment Waters must provide
exit inspections with seals and receipts to at least
90% of boaters.
ZQM Containment waters must provide exit
inspections with seals and receipts to ALL boaters.

Seal Receipts
Seals are only valid with a matching receipt. The seal
tells you that the watercraft has not launched since
its last inspection. The receipt tells the next inspector
what kind of inspection or decontamination was
performed at the last site, in addition to when it was
performed and by whom. This information will help
to determine the risk this watercraft poses and what
type of inspection or decontamination needs to be
performed before allowing the boater to launch.
A tampered seal in comparison.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�State of Colorado

State of Colorado

INSPECTION AND DECONTAMINATION SEAL RECEIPT

INSPECTION AND DECONTAMINATION SEAL RECEIPT

For use when applying green seals to boats at Negative Prevention locations.
Provide original to watercraft owner (white) and keep carbon copy (yellow).

This receipt valid for State Park preinspection only at the location where it was issued.

WID Location: _________________________________________________________________
Date: _________________________________

Time: _______________________________

Inspector’s ID #: ________________________

Boat Type: ___________________________

Vessel Registration (CL #): _______________________________________________________
Trailer Plate #: __________________________

Seal Serial #: __________________________

For use when applying green seals to boats at ANS Containment waters.

WID Location: _________________________________________________________________
Date: _________________________________

Time: _______________________________

Inspector’s ID #: ________________________

Boat Type: ___________________________

Vessel Registration (CL #): _______________________________________________________
Trailer Plate #: __________________________

q Egeria
RETURNING BOAT

PROCEDURES PERFORMED (Every line must be checked to be valid)
Exit (HEAD) Inspection:
Standing Water Decontamination:
Full Decontamination:
Plant Decontamination:
Bait Decontamination:

q Performed
q Performed
q Performed
q Performed
q Performed

HOW TO TREAT A BOAT WITH A GREEN SEAL
Always ask about live aquatic bait and follow bait
protocol. Cut off seal and let boat launch if one of
the following are true:
1.) Boat is returning to the same location; or
2.) Boat has been decontaminated; or
3.) Boat is clean and fully drained.
If not, perform an inspection prior to launch.

or
or
or
or
or

q Not Performed
q Not Performed
q Not Performed
q Not Performed
q Not Performed

White—Owner/Operator

q NZMS
q Yes

q Quagga
q No

PROCEDURES PERFORMED (Every line must be checked to be valid)
Exit (HEAD) Inspection:
Standing Water Decontamination:
Full Decontamination:
Plant Decontamination:
Bait Decontamination:

q Performed
q Performed
q Performed
q Performed
q Performed

q Not Performed
q Not Performed
or q Not Performed
or q Not Performed
or q Not Performed
or
or

HOW TO TREAT A BOAT WITH A GREEN SEAL FROM A CONTAINMENT WATER

NOTES:

_____________________________
_____________________________
_____________________________
_____________________________
_____________________________

CLEAN, DRAINED, AND DRY BOATS GET ON THE WATER FAST!
Distribution:
1 - 2/2020 – 130,000

Seal Serial #: __________________________

q EWM

Yellow—Inspection Location
RW1-28/21520-20

When applied properly, seals with receipts should
decrease the amount of time for the boater and the
inspector. In most cases, the watercraft will not need
to be inspected or decontaminated upon entry if they
have a green seal with a valid receipt.
Boaters
that lose a white receipt from prevention waters,
	&#13;  
or are returning to the same location with a valid white
or blue receipt, and have an I/O, inboard or ballast tank

Always ask about live aquatic bait and follow
bait protocol. Cut off seal and let boat launch
if one of the following are true:

NOTES:

_________________________________

1.) Boat is returning to the same location; or _________________________________
2.) Boat has been decontaminated.

_________________________________

If not, perform an inspection to check for
_________________________________
standing water.
• If there is no standing water and the boat is clean and dried, allow launch.
• If any standing water is found, a standing water decontamination is required before allowing launch.
CLEAN, DRAINED, AND DRY BOATS GET ON THE WATER FAST!
Distribution:
2 - 2/2020 – 40,000

Blue—Owner/Operator

Yellow—Inspection Location
RW1-28/21518-20

will not be decontaminated per standing water rule 3A
if the seal itself is intact and has no appearance of being
tampered with. The inspector must educate the boater
to keep their receipt in the future.
Some state parks have a pre‐inspection policy in place.
Blue receipts are only valid for pre-inspection if they
were decontaminated upon leaving the containment
reservoir or if they are returning to the same location.

Green Seal Removal Flow Chart 2020

Chapter 5: Watercraft Inspection Procedures

67

�Seals Explained to the Public:
• Green does NOT mean go!
• A green seal is proof of prior
inspection.
• It will speed up your entry to the next
water.
• The boat operator still has to stop at
the inspection station and have the
seal and receipt verified.
• The boat will be allowed to launch if
it is returning to the same location,
been out of the water for more than
30 days, or the watercraft is clean,
drained, and dry.
• If the boat is not returning to the
same location or has not been out
of the water for more than 30 days,
it may get a quick check prior to
launching.
• If the watercraft is not clean and dry,
it will most likely get re-inspected.
• Keep watercraft clean, drained, and
dry and get on the water fast!
How do I treat a seal that is NOT green?
Colorado greatly appreciates seals with receipts
from all jurisdictions across the nation. This physical
documentation indicates that a boat has not launched
since the seal was applied and enables the inspector
to adequately determine risk according to Colorado
procedures. Colorado inspectors must utilize the
information on the receipt to properly determine
risk. Colorado is concerned about stopping the
spread of all ANS, and not just zebra or quagga
mussels. Therefore, inspectors should inspect the
watercraft and follow standing water procedures and
triggers for decontamination. Inspectors must use
the accompanying seal paperwork, if any exists, to
complete data requirements on the Activity Log or
Data Collector.
Regional WID Data Sharing System
The Regional WID Data Sharing System (System)
is in use at more than 200 locations across the west,

68

including 52 WID stations in Colorado. CPW
developed the System and maintains ownership
and oversight. The states of Arizona, Montana,
Nebraska, Nevada, New Mexico, Oregon, Utah,
Washington, and Wyoming as well as the Lake Tahoe
Regional Planning Agency, Solano County Water
Agency, Mussel Dogs, and TiGE are now using the
System as their primary form of data collection and
management.
The purpose of the System is to record information
related to WID electronically and to share
information in a timely manner across jurisdictions to
aid collaborative efforts to prevent the spread of zebra
and quagga mussels and other ANS.
The System consists of a mobile application, website,
and shared database hosted on a private server. The
mobile application is compatible on all iOS and
Android devices. This reduces the operating costs for
mobile data collection and data entry while increasing
accuracy. It provides for improved reliability in data
collected in the field at WID stations, in addition
to rapid query
capacity for ondemand reporting.
Lead agencies are
able to customize

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�the user interface of the mobile application in
alignment with both western regional standards and
state laws, regulations, and priorities.
The System is used for data entry, viewing, editing,
querying, and reporting. An included risk assessment
tool shows where boats are moving after launching in
mussel infested waters and sends an alert to the next
known destination. With the benefits of data sharing
proving to be abundant, the states of Arizona, Nevada
and Utah have been using the System to send out
timely electronic alerts of watercraft leaving infested
waters. This increased timely communication has
directly increased the number of infested watercraft
being intercepted within the western region before
launching in uninfested waters.
CPW manages and operates the System through
a private industry contract utilizing federal grant
dollars. The data itself is the property of the state
agency that input the information. CPW leads
a Governance Committee, consisting of user

organizations that is charged with evaluating and
prioritizing requests, changes and enhancements.
The Governance Committee works to collectively
determine the viability and usefulness of new
technologies.
It is expected that this System will become industry
standard for entities performing WID. As users
increase, this system will continue to improve
communications among jurisdictions to enable field
staff and managers to accurately focus resources
towards effective risk mitigation related to the
prevention and containment of zebra and quagga
mussels and other harmful ANS.
Inspectors must use the system in real time in order to
benefit from the many features that help to determine
risk at the ramp. Also, the data collected is imperative
to inform the budget and other decisions related
to WID operations. Obtaining accurate and timely
information is imperative for success.

Entities Employing WID Mobile for Data Collection

Chapter 5: Watercraft Inspection Procedures

69

�Inspection Protocols
The following science-based standard protocols
have proven effective to identify and intercept
watercraft harboring zebra or quagga mussels, New
Zealand mudsnails, and noxious weeds including
Eurasian watermilfoil. By following these protocols
and educating boaters, you WILL prevent the spread
of ANS.

Step 2: Greeting and Education
• Introduce yourself.
• Explain the purpose of inspection and inform the
boater that you are looking for zebra or quagga
mussels and other invasive species that move on
watercraft (e.g. bumps on boats).
• Provide a brochure or educational item.
• Inform the boat operator that watercraft must be
clean, drained, and dry in between every use.
This includes removing water drain plugs and
plants from the conveyance before traveling over
land.
Step 3: Initial Assessment
• Record in the Data Collector or Activity Log the
following information
• In or Out
• Boat Registration Number
• Trailer License Plate
• Vessel Type
• Propulsion Type
Step 4: Check for Seal and Receipt to determine if
the watercraft is high or low risk.
Low Risk Watercraft is defined as those with:
• Green Seal and Matching Receipt from the same
location.
• Green Seal and Matching White Receipt
(negative location).
• Green Seal and Matching Blue Receipt for the
same ANS present in the receiving water.

Step-By-Step Protocol for Inspections:
Entrance Inspection Step-By-Step Protocol—
All Waters
All stations regardless of status (positive, suspect,
or negative) perform entrance inspections for boats
coming into the lake or reservoir.
Step 1: Safety
• To ensure personal and public safety, the
inspector must ask the driver to turn off the
engine, put on the parking brake, and step out
of the vehicle.
• Consider putting chocks under the wheels of
the vehicle and the trailer. The inspector will have
to climb on the watercraft and under the trailer,
so it is important to prevent boats and trailer
from rolling.
70

Perform Seal Removal for Low Risk
Watercraft:
• Make sure the seal was not tampered with and
that the receipt matches.
• Ask about live aquatic bait and follow bait
protocol.
• Thank the boater and allow launch.
High risk boats must be fully inspected following steps
5–8 detailed below. High risk boats are defined as
those that:
• Do not have a seal and matching receipt.
• Have a seal that appears to be tampered with.
• Have a seal that is not from Colorado.
• Have a seal that is not green.
• Have a green seal from Colorado with a blue
receipt for ANS not present in the receiving water.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Step 5: Boating History
There are two very important questions that must be
asked:
1. Has the boat launched out of state in the last
60 days?
a. If yes, where?
2. Where has the boat launched in the last 60 days?
a. Listen carefully to see if any of the
locations listed are positive, suspect or
infested and record that information in
the data collector.
Note: Inspectors must ask both of the above
questions. There are reservoirs in other states that
are named the same as here (e.g. Sylvan Lake State
Park in South Dakota or Cherry Creek Reservoir
State Park in Illinois). If the inspector asks only
one of the above questions, or combines these two
questions into one: “Where has the boat launched
in the last 60 days?”, it is likely the inspector will
not get complete information which could result
in a mussel boat being launching and infesting
Colorado!
Step 6: Live Aquatic Bait
• Ask if they have live aquatic bait:
a. If yes, follow bait protocol.
b. If not, continue with inspection.
Step 7: Perform the visual and physical (tactile)
entrance inspection of the watercraft, using the
acronym H.E.A.D. to ensure that the watercraft is
fully inspected.
Hull and Trailer—Rapid Exterior Inspection
1. Look over (visual) and feel (tactile) the entire
watercraft on both sides of hull and trailer.

2. Physically inspect the through hull fittings and
document if there are ballast tanks.
3. Check trailer bunks or rollers, tire wells, lights,
and electrical.
4. Remove any plants or plant fragments that are
present.
5. The bilge plug should be kept out during overland
transport per state regulation. Check to make
sure it is out and educate the boat operator of this
rule, if it is still in, while having the boat operator
remove the plug for inspection.
• Physically and visually inspect the bilge area
using a flashlight.
• Ask the boat operator to activate the bilge
pump, if present.
6. If the watercraft has an inboard engine, be certain
to inspect the prop, prop shaft, and rudder.
Note: It is important to start and end the inspection
at the same place on each watercraft. Look the boat
over and feel the hull with the boater. Both you
and the boater should feel the ridges, seams, and
recessed bolts of the watercraft. The young mussels
may feel like bumps or sandpaper on the craft. If
you or the boater feel a rough spot, look for attached
mussels. Trailers can pose a high risk so carefully
check trailer rails, lights and electrical wires, as
well as the license plate and trailer pads. This is a
good opportunity to use your inspection mirrors
and flashlights to help look into difficult nooks and
crannies along the underside or hull and trailer.
Engine or Motor
1. Ask for the outboard or I/O to be lowered.
2. Visually and physically inspect all engine
compartments with a flashlight.
3. Visually and physically inspect the gimbal area of
the outboard or I/O with a flashlight.
Chapter 5: Watercraft Inspection Procedures

71

�4. Visually and physically inspect
the transom or including all
instruments (e.g. pitot tubes or
transducers).
Anchor and Equipment Checked
1. Ask to see the anchor and
anchor rope or chain.
2. Visually and physically inspect
the anchor and rope or chain
for mud, plants and/or ANS.
3. Check any additional
equipment such as life vests,
fenders, buoys, paddles, ropes,
nets, etc.
4. Ensure all equipment is clean and dry.
Drain and Check Interior Compartments
Inspectors need to get into the watercraft to inspect
interior compartments that could hold standing water
(e.g. wells).
1. Ask for permission to board the watercraft
and ask the boater to climb in first. Follow the
boater into the watercraft in the same way they
entered. Be careful to prevent either the boater or
inspection staff from falling or getting hurt.
2. Ask the boater to open up compartments so you
can inspect all bait wells, live wells, equipment
lockers and verifiable ballast tanks.
• If the watercraft has standing water in the
bait well or in any container, the inspector
should work with the boater to remove
standing water from the watercraft
using a pump, sponge, or towel. If the
watercraft can’t be drained, it should be
decontaminated.
3. If the watercraft has an I/O or inboard engine,
be sure to inspect the engine compartment and
its bilge.

72

4. Physically and visually inspect any
ballast tanks or bags. Most ballast
can’t be drained or visually and
physically inspected, so be certain
to follow standing water rules for
decontamination.
5. Ensure that all compartments are
fully drained and dried to the best
of your ability.
Note: Mandatory standing water
decontamination is required for I/O
engines, Inboard engines, ballast tanks
or bags, or any other compartment
that can’t be drained according to the
standing water rules on page 78.
Step 8: Encourage Exit Inspection and Closeout
1. Remind the boater to replace bilge plug. The
boater is responsible to ensure the watercraft is
watertight before launching.
2. Ask the boater to raise the engine or motor to
ensure no damage takes place during transport.
3. Ensure all inspectors are finished looking at the
watercraft and that nothing was found.
4. Yell “stand clear” to ensure the safety of staff and
the public.
5. Remind the boater to get an exit inspection and
obtain a green seal and receipt on the way out to
speed up the inspection next time.
6. Either instruct the boater on decontamination
requirements  OR thank the boater for keeping
the watercraft clean, drained, and dry; and allow
them to launch.
7. Complete the record in the Data Collector or
WID Activity Log.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Exit Inspection Step-By-Step Procedure
Exit Inspections are important to make an
additional educational contact with the boater
reinforcing that watercraft should be clean, drained,
and dry in between each use. It also verifies that the
boater has followed the proper protocols to clean off
the watercraft and completely drain all compartments
prior to leaving. Lastly, it is required to obtain a seal
and receipt.
Remind the boater of the negative impacts of zebra
and quagga mussels and other ANS. Repeat the
primary educational message Clean, Drain, Dry and
explain why boaters need to do it each time they use
their watercraft.
Step 1: Safety
• To ensure personal and public safety, the
inspector must ask the driver to turn off the
engine, put on the parking brake and step out
of the vehicle.
• Consider putting chocks under the wheels of
the vehicle and the trailer. The inspector will have
to climb on the watercraft and under the trailer,
so it is important to prevent boats and trailer
from rolling.
Step 2: Greeting and Education
• Introduce yourself.
• Explain the purpose of inspection and inform the
boater that you are looking for zebra or quagga
mussels and other invasive species that move on
watercraft (e.g. bumps on boats).
• Provide a brochure or educational item.
• Inform the boat operator that watercraft must be
clean, drained, and dry in between every use. This
includes removing water drain plugs and plants
from the conveyance before leaving.
Step 3: Initial Assessment
• Record in the Data Collector or Activity Log the
following information
• In or Out
• Boat Registration Number
• Trailer License Plate
• Vessel Type
• Propulsion Type

ZQM and Other ANS Containment—Ask the
Boater Where They Intend to Launch Next.
If they plan to go to a different location next, or
they don’t know, explain that the watercraft may
need decontamination before launching elsewhere.
Other ANS Positive Waters
Offer to decontaminate compartments that can’t be
drained before they leave.
ZQM Containment Waters
Watercraft destined for another location require a
MANDATORY decontamination prior to leaving
the containment water body.
Step 4: Live Aquatic Bait
• Ask if they have live aquatic bait.
• If yes, recommend the boater properly
dispose of bait in the trash or follow bait
protocol in Chapter 6.
• If not, continue with inspection.

Step 5: Perform the visual and tactile inspection
of the watercraft, using the acronym H.E.A.D. to
ensure that the watercraft is fully inspected.
Hull and Trailer—Rapid Exterior Inspection
1. Look over entire watercraft on both sides of hull
and trailer.
2. Physically inspect the through hull fittings.
3. Check trailer bunks or rollers, tire wells, lights,
and electrical.
4. Remove any plants or plant fragments.
5. Ask the boater to remove the bilge plug when
inspecting the transom. Inform the boater that
the bilge plug must be kept out during overland
transport per state regulation. If applicable, have
the boater activate the bilge pump.
Chapter 5: Watercraft Inspection Procedures

73

�6. If the watercraft has an inboard engine, be certain
to inspect the prop, prop shaft, and rudder.
Note: It is important to start and end the inspection
at the same place on each watercraft. Look the boat
over and feel the hull with the boater. Both you
and the boater should feel the ridges, seams, and
recessed bolts of the watercraft. The young mussels
may feel like bumps or sandpaper on the craft. If
you or the boater feel a rough spot, look for attached
mussels. Trailers can pose a high risk so carefully
check trailer rails, lights and electrical wires, as
well as the license plate and trailer pads. This is a
good opportunity to use your inspection mirrors
and flashlights to help look into difficult nooks and
crannies along the underside or hull and trailer.
Engine or Motor
1. Ask for the outboard or I/O to be lowered.
• Do this twice at containment reservoirs.
2. Visually and physically inspect all engine
compartments with a flashlight.
3. Visually and physically inspect the gimbal area of
the outboard or I/O with a flashlight.
4. Visually and physically inspect the transom or
including all instruments (e.g. pitot tubes or
transducers).

74

Anchor and Equipment Checked
1. Ask to see the anchor and anchor rope or chain.
2. Visually and physically inspect the anchor and
rope or chain for mud, plants, or ANS.
3. Check any additional equipment such as life vests,
fenders, buoys, paddles, ropes, nets, etc.
4. Ensure all equipment is clean and dry.
Drain and Check Interior Compartments
Inspectors will need to get into the watercraft to
inspect interior compartments that could
hold standing water.
1. Ask for permission to board the
watercraft and ask the boater to
climb in first. Follow the boater into
the watercraft in the same way they
entered. Be careful to prevent either
the boater or inspection staff from
falling or getting hurt.
2. Ask the boater to open up
compartments so you can see all bait
wells, live wells, equipment lockers
and verifiable ballast tanks. The
inspector should work with the boater
to remove standing water from the
watercraft using a pump, sponge, or
towel.
3. If the watercraft has an I/O engine or
inboard engine, be sure to inspect the
engine compartment and its bilge and
run bilge pump, if applicable.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�4. Either instruct the boater on decontamination
requirements OR thank the boater and remind
them of the importance of keeping the watercraft
clean, drained, and dry.
5. Complete the record in the Data Collector or
WID Activity Log.
Important Notes for Containment
(Suspect or Positive) Reservoirs
At containment reservoirs, it is mandatory that all
boats be inspected upon exit.
The main focus of containment in Colorado is to
make sure standing water does not leave the reservoir
on a watercraft. The reason for this is because to date
only veliger zebra and quagga mussels (microscopic
larvae) or environmental DNA has been detected in
Colorado’s water bodies.

4. Physically and visually inspect any ballast tanks or
bags to the best of your ability. Most ballast can’t
be drained, so be certain to follow standing water
rules for decontamination.
5. Ensure that all compartments are fully drained to
the best of your ability.
Note: Mandatory standing water decontamination
is required for I/O engines, Inboard engines, ballast
tanks or bags, or any other compartment that can’t
be drained according to the standing water rules
page 78.
Step 7: Apply Seal and Provide Valid Receipt
1. Properly apply a green seal to watercraft and
trailer.
2. Give the boater a copy of the white or blue receipt
and explain that the seal is valid only if the receipt
is kept and the seal is intact.
Step 8: Closeout
1. Remind the boater that they must leave all water
drain plugs out during overland transport.
2. Ask boater to raise the engine or motor to ensure
there is no damage.
3. Ensure all inspectors are finished looking at the
watercraft and that nothing was found.

The difference between containment and prevention
exit protocols is that at containment reservoirs the
priority is focused on draining standing water and
performing standing water decontaminations, in
addition to ensuring that no plants, mud, or animals
leave the lake or reservoir on or in watercraft.
The goal for containment waters is such that all
exiting boats get a thorough and complete inspection
and are issued a green seal and a BLUE receipt. If the
watercraft can’t be drained during the exit inspection,
and is intended to launch in a different location next,
it must get a standing water decontamination prior
to leaving. All watercraft using ZQM Containment
waters must be recorded in the Data Collector.
Note: Not all locations positive for EWM
or NZMS have watercraft inspection and
decontamination stations.
Containment locations issue green seals and
BLUE receipts for exiting boaters. The blue receipt
provides a visual warning to the next inspector that
the watercraft is from a positive or suspect water
body. Follow seal removal protocol for boats from
containment waters.
If at any point suspect or known ANS are found,
or the watercraft can’t be drained → send to
decontamination.

Chapter 5: Watercraft Inspection Procedures

75

�Exit Inspection Procedure at ZQM
Containment Reservoirs for Unverifiable
Water (Ballast, Inboard, I/O):
Ask the boater where they plan to launch the
watercraft next.
• If they are planning to return to the same
reservoir → inspector performs an exit inspection
including having the boater run the ballast or
engine pumps and expunge interior water → issue
green seal and receipt and enter the inspection
record in the data collector.
• If they are planning to launch the watercraft
in a different reservoir, or they do not know
where they are going to launch next → inspector
performs an exit inspection, including having
the boater run the ballast or engine pumps and
expunge interior water → perform a minimum of
a standing water decontamination → issue green
seal and receipt.

76

Note: There are rare occasions when the weather is
unsafe for inspectors to be working (e.g. lightening and
hail) and therefore large volumes of boaters can leave
containment reservoirs without inspection, draining
or decontamination. It is imperative that these boats
get intercepted and decontaminated before entering
the next reservoir. The same is true for ballast boats
intending to return to the same location and go
somewhere else instead.

Off‐Water Inspection
Procedure: All Waters
Inspections that are
performed at offices and
businesses that are not
© brad Henley
located at a water body.
They could, however, be performed at a water body
for someone needing a seal but not intending to
launch at that location next. This is a hybrid entrance‐
exit inspection, which follows the entrance inspection

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�procedure and ends with a seal application. Follow
steps 1–7 of the Entrance Inspection protocol detailed
on pages 70–72 and complete the inspection with a
seal application and closeout.
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Step 7:

Step 8:
Step 9:

Safety
Greeting and Education
Initial Assessment
Check for Seal and Receipt to determine
if boat is high or low risk
Boating History
Live Aquatic Bait
Perform the visual and physical (tactile)
entrance inspection of the watercraft,
using the acronym H.E.A.D. to ensure
that the watercraft is properly inspected
Apply Seal and Provide Valid Receipt
Closeout

Additional Considerations for Inspecting a
Personal Watercraft (P.W.C.)
Personal Watercraft (P.W.C.) have a unique
configuration and specific components that require
additional considerations when performing an
inspection. While the majority of the inspection
protocol is unchanged when inspecting a P.W.C.,
the following modifications to Step 7—The Visual
and Tactile inspection of the watercraft should be
implemented to ensure a fully cleaned, drained, and
dry watercraft.
Step 7: Perform the visual and tactile inspection
of the watercraft, using the acronym H.E.A.D.
to ensure that the watercraft is fully inspected.
Hull and Trailer—Rapid Exterior Inspection
1. Look over (visual) and feel (tactile) the entire
watercraft on both sides of hull and trailer.
2. Physically inspect the through hull fittings.
3. Check trailer bunks or rollers, tire wells, lights
and electrical.
4. Inspect the intake grate on the underside of
the PWC.
5. Remove any plants or plant fragments that
are present.

6. Ensure the boater has removed the bilge plug(s)
when inspecting the transom. There are often
two bilge plugs on a P.W.C.—one on each side of
the jet.
7. Physically and visually inspect the bilge area
(e.g. feel the bilge area) and use a flashlight to
visually see if any ANS are present.
8. If applicable, have the boater activate the bilge
pump.
Jet Engine
1. Visually and physically inspect the jet
(steering nozzle) with a flashlight.
2. Visually and physically inspect the transom or
rear of the watercraft with a flashlight.
3. Stand clear and ask the operator to start the
P.W.C.
4. Once started, have the operator rev the engine
2–3 times to ensure the engine and exhaust
cooling systems are free of water.
5. If water is expelled from the jets during this
process the watercraft should be sent for
decontamination.
Anchor and Equipment Checked
1. Ask to see the anchor and anchor rope or chain.
2. Visually and physically inspect the anchor and
rope or chain for mud, plants and/or ANS.
3. Check any additional equipment such as life vests,
buoys, paddles, ropes, nets, etc.
4. Ensure all equipment is clean and dry.
Drain and Check Interior Compartments
1. Ask the operator to raise the seat of the P.W.C.
2. Inspect the engine compartment for mud, water,
plants and mussels using a flashlight
3. Ask the boater to open the compartment in front
of the handlebars.
4. Inspect the engine compartment for mud, water,
plants and mussels using a flashlight.
5. If the watercraft has standing water in either of
these compartments, the inspector should work
with the operator to remove standing water from
the watercraft using a pump, sponge, or towel.
If the watercraft cannot be drained, it should be
decontaminated.
6. Ensure that the compartments are fully drained to
the best of your ability prior to launch.

Chapter 5: Watercraft Inspection Procedures

77

�Rules for Standing Water
It is imperative that standing water be drained
from watercraft to prevent the movement of
microscopic mussel larvae or veligers, plant
fragments, diseases, and other animals from
being transported. Inspectors must pay careful
attention to any compartment that cannot be
completely drained and therefore may contain
standing water. Zebra and quagga mussel veligers
are microscopic and can be transported in water,
capable of surviving up to 27 days in watercraft
compartments.
There are two types of water on boats:
Verifiable Water—This is water in compartments
that you can see, feel, or visually inspect, such
as in wells or bilges. This is the majority of
water on the boats you will inspect.
Unverifiable Water—This is water in
compartments that you cannot see, feel, or
visually inspect. Ballast, I/O engines, and
Inboard engines all carry unverifiable water.
Rule #1—Mandatory Decontamination for
Watercraft with Standing Water from Listed or
Unknown Locations
If the watercraft has been in suspect, positive,
or infested waters and has any standing water,
it is mandatory to send the watercraft to
decontamination.
Especially in cases where the watercraft has
an I/O or Inboard engine, or a ballast tank or
bag, it is mandatory to send the watercraft to

78

decontamination and thoroughly flush those
compartments.
Rule #2— Watercraft with Verifiable Water
Incoming watercraft that is not green sealed from
unknown sources or from prevention waters
should be clean, drained, and dry. Sponge, pump,
or towel out standing water, or decontaminate,
prior to allowing launch.
On exit from prevention and other ANS
containment reservoirs, drain to the best of your
ability including pulling water drain plugs and
remind the boater to dry.
Rule #3—Boats with Unverifiable Water
(e.g. Ballast, I/O, and Inboard Engines) for
Unverifiable Water
Follow the procedures A–C below for boats with
unverifiable water in ballast tanks
A. Watercraft without a green seal or receipt
must get a mandatory standing water
decontamination.
B. Watercraft returning to the same
location with a green seal and receipt
must be fully drained and do not require
decontamination.
C. Watercraft moving between Colorado
prevention (negative) waters with
a green seal and white receipt must
be fully drained and do not require
decontamination.
Educate all boaters to get green seals and receipts
when exiting the WID Station!

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Live Aquatic Bait (see Chapter 6)

•

What do the regulations say about live aquatic bait?
Colorado Parks and Wildlife regulations require that
all live aquatic bait
must be purchased
from an authorized
Colorado bait
dealer and must be
accompanied by a
dated receipt. The
receipt is valid for
ANS inspections for
seven days.

© PHIL MYERS, MUSEUM OF ZOOLOGY,
UNIVERSITY OF MICHIGAN

•
•

Live fish are only allowed for use as bait on
the East Slope below 7,000 feet and at Navajo
Reservoir.
• In those areas, the transportation of live
fish as bait is prohibited between waters
unless it was purchased from a Colorado
bait dealer, as described above.
• Fish harvested in the wild for use as
live bait can only be used in the water
in which it was caught and cannot be
transported or stored for later use.
• The exception is fish harvested within
Baca, Bent, Crowley, Kiowa, Otero,
or Prowers counties which can be
transported and used only within those
six counties.
The transportation of live crayfish is prohibited on
the west slope and from Sanchez Reservoir.
It is unlawful to transport live bait across state
lines without an importation permit.

What is the protocol for live aquatic bait treatment?
If a vessel has live aquatic bait in a container or a well
with standing water, be sure to check the “Live Bait
Present” field on the mobile application in the data
collector. Then ask the boater for a bait receipt.
Note: Under Colorado Fishing Regulations only live fish
bait mandates a receipt that lists the name of the bait
and the quantity/number. Other live aquatic bait
(e.g. crayfish or salamanders) may only have a basic
store receipt without that information.

© John Woodling

Chapter 5: Watercraft Inspection Procedures

79

�In places where live bait is allowed, the inspection or
treatment will vary depending on the location and
type of bait.
If the boater has bait in a container with standing
water, allow them to proceed and launch with the
bait if the following three items are all true:
• The receipt is from a Colorado bait dealer and
• The receipt is dated no more than seven days
and
• The species listed on the receipt matches up
with the bait in question.
If the receipt is older than seven days, perform a bait
treatment to remove the threat of ANS in the water.
Ask the boater to remove the bait from the vessels
live well or container and place it into a holding
container. The live well or container must be drained
and decontaminated using standard decontamination
procedures (120ºF hot water rinse with low pressure)
before the bait is returned.

If entering, the container or well water can be replaced
with water from the lake or reservoir the boat is
launching in.
If the boater DOES NOT have a receipt the live
aquatic bait will not be permitted for use and will
have to be properly disposed of in the trash. However,
the following scenarios will result in the bait being
allowed following a treatment:
• If the bait is fish and was harvested within 1⁄ 2 mile
of the reservoir from man-made ditches or canals.
• If the bait is fish and was harvested within the SE
six county exemption (John Martin Reservoir).
• If the bait is wild harvested non-fish bait (crayfish,
frogs, or salamanders).
Out of state bait is not permitted for use.
When the boater leaves your water, encourage him
or her to properly dispose of unused bait in the trash,
never in the water. Completely drain the live/bait well
and any other containers. The container or well may
need to be sponged, toweled, or pumped to get the
water out so that nothing leaves the reservoir.
Note: Any live aquatic bait purchased from an outof-state dealer is illegal and must be disposed of in the
trash. Do not allow it to be used at your water body.
What Options Does the Angler have if the
Live Aquatic Bait is Not Allowed?
If the live aquatic bait is not allowed at that site, the
angler has a few options:
• Leave the bait in the car or truck.
• Dispose of the bait in the trash.
• Go fishing at a different reservoir where that bait
is allowed.

80

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Reporting
All persons have a duty to immediately report
suspect or known ANS to CPW per state law. If you
see something you think is an ANS while you are
working or playing in the outdoors, please report it to
the ANS Program Office. The ANS Act requires that
any person who knows or suspects an ANS is present
(plant, animal, or pathogen) must immediately report
the suspect to the ANS Program.

Do not allow a known mussel boat to leave the
WID Station without decontamination. Call Law
Enforcement if the boat operator is not compliant and
you need help!

There are three options for general reporting:
• State ANS Program Office: 1-303-291-7295
• Email: Invasive.Species@state.co.us
• Website: https://cpw.state.co.us/aboutus/Pages/
ISP-Report-Invader.aspx
WID Reporting Requirements
WID Supervisors must send ANS WID Activity Logs
to CPW Invasive Species Program at 6060 Broadway,
Denver, CO 80216 at the end of each month. OR
enter the data into the excel template provided and
email excel files to Invasive.Species@state.co.us.
Data collector users will send data into the online
database via cellular or MiFi. For assistance with
the ANS web or mobile application, please contact
the Istonish help desk at helpdesk@istonish.com or
1-888-390-7275.
If you suspect that there is an ANS on a watercraft or
in the reservoir (e.g. unidentifiable bumps on a boat
or plants/animals in the reservoir), it is required that
you collect the specimen, properly document, and
report prior to decontamination. See Chapter 6 for
detailed procedures regarding suspect watercraft and
intercepting “mussel boats”. You or your supervisor
must notify the ANS Program immediately via email,
text or phone call. Documentation, samples, and
photographs must be sent in within 24 hours.
Full Decontamination:
• Report
• Document
• Collect
• Decontaminate
• Re-Inspect

State Parks Pre-Inspection Program
Pre-Inspection is a program in place at select State
Parks to provide access when inspectors are not
present. Boaters that launch during pre-inspection
hours must have a valid green seal and receipt prior to
launching or they will be subject to fines.
1. Green seals with white receipts are valid for preinspection anywhere.
2. Green seals with blue receipts are only valid for
pre-inspection at the same site the seal was issued
or following decontamination.
3. Seals that are not green, including out of state
seals, are NEVER valid for pre-inspection.
Criteria for Pre-Inspection Implementation
• The State Park must have law enforcement patrol
available, preferably overnight, but definitely
outside of inspection station hours of operation.
• The State Park is prohibited from closing or
locking the ramps outside of inspection hours.
• The State Park is not a ZQM Containment water
or has not been de-listed for ZQM in the past.
• Pre-Inspection is approved by the reservoir owner
and water operators.
In State Parks with pre-inspection, the certified
“Agent” must inspect boats according to state protocol
when the inspection station is open. When the
inspection station is not open, boats must provide
proof of prior inspection by entering their own
information into a log book and placing their seal and
receipt into a drop box on the boat ramp.

Chapter 5: Watercraft Inspection Procedures

81

�Procedure for Pre-Inspection
Boat Operators:
• Cut of the green seal.
• Fill out the log paperwork.
• Place the green seal and matching receipt in the
drop box at the boat ramp.
• Launch the boat.

Regulations for Citation
#103-n.5 pursuant to Title 33-10-106(2) (d) C.R.S.
Unlawful [(launching) (attempt to launch) (operating)
(removal)] of any [(vessel) (floating device)]
without first submitting the [(vessel) (floating device)
(specific equipment name) (associated equipment)]
to inspection. V-Code: 6292 L Fine: $50.00

WID Station Staff:
• Upon opening the station in the morning,
compare the pre-inspection logs to the seals and
receipts in the drop box, and to the trailers in the
parking lot.
• Identify any violators and provide that
information to Law Enforcement.

Title 33-10.5-105(1) (c) C.R.S.: No person shall
knowingly or willfully refuse to comply with a proper
order issued under this article. (First Offense)
V-Code: 6292X Fine:$150.00

Note: Violators must be intercepted on the water or
as they come off the water. Violators may be issued
a citation.

82

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Outdoor Small Group Session—
Inspection Practice
Practice performing inspections and learn the
protocols. Work in small groups of 2–3 people:
Inspector, Boater, and Observer.
• The Inspector should use the Data Collector or
Activity Log.
• The Boater should answer questions following
the scenarios below.
• The Observer should use the Quality Control
Form.
Once the practice inspection is complete, the
Observer can report back to the group what was done
well and what needs to be improved upon. Then
switch jobs until each group member has been an
Inspector, Boater, and Observer.

Outdoor Hands-On Inspection Practice—
Boater Scenarios
Boater #1
The last place you were boating is Chatfield State Park.
You have not been out of the state in the last 60 days.
You have not been to any suspect, positive or infested
waters in the last 60 days. You have been inspected
before but are not well educated. You have no live
aquatic bait. You have no ballast tanks.

Boater #2
The last place you were boating is Blue Mesa Reservoir.
You have not been out of the state in the last 60 days.
You have not been to any suspect, positive or infested
waters in the last 60 days. You have been inspected
before and appear to be well educated. You have no
live aquatic bait. You have no ballast tanks.
Boater #3
The last place you were boating is Sylvan State Park
(in South Dakota). Let the boat inspector ask you
BOTH questions to learn that your last boating place
was out of state. You have not been to any suspect,
positive or infested waters in the last 60 days. You have
never been inspected before. You have no live aquatic
bait. You have no ballast tanks.
Boater #4
The last place you originally say you were boating at
is Lon Hagler SWA (there is no WID station there).
In the last 60 days you
claim to have boated at
Chatfield, Horsetooth,
Lake John, Eleven Mile,
Elkhead, McPhee, and
Antero (all four corners of
the state). You later change
your story and tell the
inspector that you were
really at Green Mountain
last weekend. You appear
very well educated
about boat inspections and ANS—almost too well
educated as if you are trying to avoid an inspection or
decontamination by hiding the fact that you were at
Green Mountain. You have no live aquatic bait. You
have no ballast tanks.
Boater #5
The last place you were boating is Carter Lake. You
have not been out of state or to any suspect, positive
or infested waters in the last 60 days. You have wild
harvested crayfish with no receipt in standing water in
your live well. You have no ballast tanks. Your boat is
really dirty, crusty, and slimy.

Chapter 5: Watercraft Inspection Procedures

83

�Chapter 5 Review Questions
1. Our goal as inspectors for every boat is no _______________ , _______________ , _______________ ,
and _______________.
2. Rank the following in order of priority as an inspector (1–5, with one being most important).
_____ Drain
_____ Inspect—Assess Risk
_____ Safety
_____ Educate the Boater
_____ Decontaminate
3. Name three items that are mandatory equipment for an inspector during an inspection.
______________________________________________________________________________________
4. Which of these vessels should be impounded according to the Colorado protocol?
a. The vessel with confirmed ANS and the boater refuses decontamination.
b. The boater who is unhappy with the inspection process.
c. The boater just came from Wyoming with standing water and it’s raining on the boat ramp.
d. The boater has six gallons of ice and pop in the built-in cooler in their boat.
5. Circle true or false for the following statements about green seals.
a. Green means go! True or False
b. A green seal is proof of prior inspection. True or False
c. It will speed up your entry to the next water.

True or False

d. You do not have to stop at the inspection station and have the seal and receipt verified.     True or False
e. You will be allowed to launch if you are returning to the same location or the watercraft is
clean and dry. True or False
f.

If the watercraft is not clean and dry, you will most likely get re-inspected.

True or False

6. As a civilian “authorized agent” you have the authority to:
a. Impound watercraft
b. Order a decontamination
c. Search watercraft for alcohol and drugs
d. Perform an inspection or decontamination with the permission of the operator
e. None of the above

84

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�7. Which of the following is a way to remember how to do the hands-on part of an inspection?
a. H.E.A.D.—Hull/Trailer, Engine/Motor, Anchor and Anchor Rope, Drain Interior Compartments
b. B.O.A.T.—Bait, Outboard, Anchor, Transom
c. F.I.S.H.—Front, Interior, Sails, Handrails
d. C.D.D.—Clean, Drain, Dry
8. At Other ANS Positive Containment reservoirs, it is _____ that all boats be inspected upon exit.
a. Mandatory
b. Voluntary
c. Mandatory only if the inspector has time
9. Which boats get a mandatory decontamination after boating in a containment reservoir? (circle all that apply)
a. Boats with verifiable water that you can easily sponge out.
b. Boat with unverifiable water in a single ballast tank.
c. A canoe with an electric motor.
d. A cabin cruiser that has an inboard engine.
10. When should you ask about live aquatic bait?
a. Only when the boater does not have a green seal.
b. Only when you see fishing poles on the boat entering the reservoir.
c. Every time a boater enters or leaves your location, even when they have a green seal attached.
d. Never. Checking for live aquatic bait is not part of the inspection process.
11. Boats with unverifiable water are required to get a standing water decontamination if they do not have a valid
seal and white receipt from a negative reservoir (ballast, I/O, inboards) and are launching in a different water
body next. True or False
12. What should you do if you suspect you have a mussel boat? (circle all that apply)
a. Report
b. Document
c. Collect
d. Decontaminate
e. Panic

Chapter 5: Watercraft Inspection Procedures

85

�13. Name the three roles of the inspector and decontaminators:
1. _______________________________________
2. _______________________________________
3. _______________________________________
14. Colorado Parks and Wildlife staff trains boat inspectors and decontaminators (a.k.a. Authorized Agents).
It is the job of the Agents to train whom?
a. Boaters
b. Anglers
c. Members of the Public
d. All of the Above
15. How long are bait receipts from Colorado authorized dealers valid for?
a. 3 days
b. 5 days
c. 7 days
d. 10 days
16. What are the names for the two types of water found on boats?
a. Fresh water and salt water
b. Distilled water and spring water
c. Dirty water and clean water
d. Verifiable water and unverifiable water
17. Use or possession of live fish as bait is allowed West of the continental divide except at Navajo Reservoir.
True or False
18. Which of the following watercraft are considered “High Risk”? (Select All That Apply)
a. A boat that DOES NOT have a matching seal and receipt.
b. A boat with a seal that is not green.
c. A boat with a green seal and a blue receipt from a location with ANS not present at your WID station.

Day 1 Homework
1. Memorize the Entrance Inspection Procedure
2. Answer All Questions at the End of Chapters 1–5

86

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Outdoor Demonstration—Exit Inspection
What Did You Observe?
1. ______________________________________________________________________________________
2. ______________________________________________________________________________________
3. ______________________________________________________________________________________
4. ______________________________________________________________________________________
5. ______________________________________________________________________________________
6. ______________________________________________________________________________________
7. ______________________________________________________________________________________
8. ______________________________________________________________________________________
9. ______________________________________________________________________________________
10. ______________________________________________________________________________________
11. ______________________________________________________________________________________
12. ______________________________________________________________________________________
13. ______________________________________________________________________________________
14. ______________________________________________________________________________________
15. ______________________________________________________________________________________
16. ______________________________________________________________________________________
17. ______________________________________________________________________________________
18. ______________________________________________________________________________________
19. ______________________________________________________________________________________
20. ______________________________________________________________________________________

Chapter 5: Watercraft Inspection Procedures

87

�Notes
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________

88

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�C O L O R A D O

P A R K S

&amp;

W I L D L I F E

Chapter 6
Watercraft Decontamination
Procedures
Content updated from the CDOW Aquatic Nuisance Species (ANS) Watercraft Decontamination Manual, 2011

Made possible by a grant from

CPW does not endorse any products or brands
pictured or mentioned in this manual/chapter.

Revised March 2020

cpw.state.co.us
Chapter 6: Watercraft Decontamination Procedures

89

��Why watercraft decontamination?

What does watercraft decontamination
generally consist of?

Invasive species, such as zebra or quagga mussels,
are able to travel great distances over land by
Watercraft decontamination consists of a very
“hitchhiking” on watercraft. They can survive up
hot water rinse or spray at high or low pressure.
to 30 days out of water depending on temperature
There are no soaps, bleaches, or chemicals used or
or humidity. Through a comprehensive education,
recommended at this time. The hot water kills the
inspection, and decontamination program, we
mussels and other ANS, and the high pressure spray
can stop the spread of these costly invasives in the
removes them from the watercraft.
West. Once detected on watercraft, zebra or quagga
The protocol is to use 140ºF water at high pressure
mussels and other aquatic nuisance species (ANS)
(3,000 psi) to decontaminate the hull and 140ºF water
can safely and effectively be killed and removed from
at low pressure to decontaminate motors/engines.
the watercraft by certified personnel. The Western
Interior compartments are decontaminated with
Regional Panel, and most western states, follow
120ºF at low pressure.
the Uniform Minimum Protocols and Standards
(UMPS III), which requires the use of hot water
Figure 1 tells us that a 140ºF (60ºC) hot water rinse for
with high or low pressure to decontaminate boats,
ten seconds will kill all adult mussels. A 176ºF (80ºC)
motors and engines, trailers, personal gear, and other
rinse for five seconds will kill all adult mussels. Higher
equipment. The objective of decontamination is to
temperatures are not recommended for the protection
kill and remove, to the extent practical, all mussels or
of the watercraft.
suspected ANS. Killing ANS prevents establishment
of new populations as a result of watercraft and
equipment transfer.
FIGURE 1
When will decontamination be required?
Most inspections will not result in a
decontamination being performed.
However, there are numerous circumstances
that will result in a decontamination being
performed:
• If zebra or quagga mussels are found
attached to a watercraft.
• If any other ANS is positively identified or
suspected on a watercraft.
• If suspect unidentifiable bumps are detected
on a watercraft.
• If the watercraft is from a suspect, positive,
or infested water and has any water in it and
has not been decontaminated.
• If the watercraft has unverifiable water
(e.g. ballast tank, inboard or inboard/
outboard engine) and does not have a seal
and receipt.
• If the watercraft or trailer has plants attached that
can’t be removed by hand.
• If the watercraft has live aquatic bait without a
valid receipt.
• If the inspector deems a decontamination is
necessary.

Figure 2 shows that there was 0% survival of
quagga mussel veligers in water temperatures of
95ºF (35ºC). Therefore, the reduced temperature
of 120ºF for interior compartment standing water
decontaminations for the protection of the watercraft
is more than sufficient to kill veligers in those
interior compartments. This research reinforces the
importance of standing water decontaminations for
boats leaving listed waters, even if no adults or settlers
Chapter 6: Watercraft Decontamination Procedures

91

�are found on the vessel, because it proved that veligers
can live in standing water for up to 24 days at 50ºF
(10ºC), 8.5 days at 59ºF (15ºC) or 4.5 days at 86ºF
(30ºC).
FIGURE 2

Standing water decontamination is required if the:
• Watercraft did not get a decontamination when
leaving a suspect, positive, or infested water body
and has ANY water in it.
• Watercraft has unverifiable water (ballast, I/O
or inboard engines) and does NOT have a valid
seal and receipt.
• If the watercraft is unable to be fully drained
and the water can’t be sponged, toweled or
pumped out.
The standing water decontamination protocol
requires that pump temperature ratings are taken into
account when flushing or rinsing a compartment
for standing water. Some, but not all, marine pumps
are rated to withstand temperatures above 140ºF.
If the pump is rated to a lower temperature and is
flushed with 140ºF water, damage could occur. For
this reason, the protocol requires applying 120ºF in
all interior compartment flushes or standing water
decontaminations. Standing water decontaminations
of engines are performed at 140ºF at low pressure.

What are the different types of
decontamination?
There are four different types of watercraft
decontaminations. Each of these will be described in
greater detail later in the chapter.
Standing Water Decontamination
This protocol is performed to kill veligers or other
ANS in standing water that can’t be fully drained
from the watercraft. This type of decontamination
applies to interior compartments that contain water
or have equipment that has come in contact with the
water body. The interior compartments include but
are not limited to: live wells, bait wells, bilge areas,
anchor lockers, equipment storage, sea strainers,
and ballast tanks. Equipment includes but is not
limited to: anchor, mooring and anchor lines, PFD’s,
swim platform, inflatables, down-riggers planning
boards, water skis, wake boards, ropes, ice chests
(used for bait or for holding fish), fishing gear, drift
socks, bait buckets, and stringers. Standing water
decontamination also includes flushing the outboard
motor, I/O engine, or inboard engine of a watercraft.

92

Plant Decontamination
This decontamination is performed whenever plant
material cannot be removed from the watercraft or
trailer by hand. The hot water application is localized
and requires using 140ºF hot water for 15 seconds
directly on the plant material.
Bait Decontamination
This decontamination prevents the transfer of ANS
being used as bait and as contaminants in standing
water in a bait well or bucket. Strict step-by-step
procedures must be followed if the bait receipt is older
than seven days. If the bait is from out of state, or the
bait is not permitted, the bait should be disposed of in
the trash. If the boater has no receipt, and the bait is
allowed, follow the bait decontamination procedure
found later in this book.
Full Decontamination for Suspected or Known
Zebra and Quagga Mussels
This protocol is performed when adult or settler
mussels, unidentifiable bumps, or other ANS are
detected on the watercraft. This decontamination is
the most complicated of the four types and ensures
that the boat has been completely decontaminated
inside and out. The inspector must take photos
and samples for identification prior to doing a full
decontamination.

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�In rare instances, you may require the assistance of
law enforcement personnel to decontaminate or
impound a boat. A few of the situations that would
require a qualified peace officer to assist include an
uncooperative boat owner, an unavailable or broken
decontamination unit, or instances in which an
inspector simply can’t get a fully encrusted watercraft
decontaminated in one day.
Where should watercraft
decontamination stations
be located?
Watercraft inspection, draining,
and decontamination should be
located in the same general area.
The location should be far enough
from the water or boat ramp that
drained bilge/ballast/well water and
water from the decontamination
unit cannot flow into the water
body. WID Stations are ideally
on an access road where all boats
must pass prior to launch and after
exiting the boat ramp. The station
should be far enough away from
the ramp to allow users, especially
overnight campers, to move
through the interior of the property or park without
going through the inspection and decontamination
station unnecessarily.
Decontaminations should be conducted “high
and dry,” away from the water. The minimum
requirements for decontamination unit placement
include:
• Must be in a location where the water does not
run off into the reservoir or lake.
• Must be on semi-permeable surface (gravel or
dirt) where water absorbs into the ground or
evaporates off.
• Must be in a location where the inspector can
maintain visual and auditory contact with the
inspection station (which in many instances is the
boat ramp but not always).
• Must be in a secure facility where the
decontamination unit is locked up over night or
when inspectors are not present.
• Must be protected from the elements—rain, wind,
excessive cold.
• Must be in compliance with all waste water
disposal requirements in local and state laws and
regulations.

When should a portable water
containment pad be used?
If a suitable site (high and dry, away from the water
source, and on a semi-permeable surface) is not
available, or you are using a large enough amount
of water that it is not absorbing into the ground
and is ponding, you will be required to use a water
containment pad to ensure waste water is collected
and properly disposed of.

What are the requirements for a
decontamination unit?
•

•
•

The unit needs to have an adjustable thermostat
that is able to be set at 120–140ºF and maintain a
constant temperature without fluctuation greater
than 2 degrees.
Minimum flow of five gallons per minute.
Preferred pressure of 3,000 psi.
(minimum 2,500—maximum 3,500)

Chapter 6: Watercraft Decontamination Procedures

93

�What are the standard operating procedures for
a decontamination unit?
Be sure to follow the manufacturer’s operating
procedures specific to your unit.

Step-by-Step Operating Instructions for
Trailered Hydro Tek Decontamination Units

Before start up
1—Check pump oil. Check pump oil by locating
the yellow oil dip stick on top of the pump.

2—Check fluid levels. Check engine oil by locating
the yellow dip stick on the engine. Check the gasoline
and diesel fuel levels in the tank.
3—Roll out the hose all the way and and double
check all quick connects.
4—Connect the water supply and turn water on.
Maintain an adequate supply of water using a 3⁄4
inch I.D. hose with a pressure between 25 and 60 psi.
Burner power switches should be off before starting.
If the decontamination unit is tank fed, be sure there
is water in the tank and the valve is switched for
supply tank feed. Do not run dry.
Operation
1—Starting. Pull out choke and turn the key to
start position only until engine starts. Push the
choke in immediately after engine starts.
2—Purge air from system. Squeeze the trigger on
the spray gun until a constant stream of water comes
out. (Purging works best with the nozzle removed
from the wand and/or dual wand in the low-pressure
mode).
3—Select desired nozzle. Connect a 40º nozzle
securely to the spray wand. Hold the gun firmly,
squeeze the trigger for high-pressure spray.  
CAUTION: gun kicks back—hold with both hands.
94

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�4—Start the burner. To create hot water on high
pressure washers equipped with heat exchangers,
release the trigger on the gun, turn the burner to the
“on” position, and turn the thermostat to the desired
temperature.
Squeeze the trigger on the spray gun and the
burner will begin heating the water. The burner
will stop heating the water whenever the water spray
is off or if the temperature setting is exceeded.
Be sure to test the water temperature prior to
decontaminating to ensure you are working at the
correct temperature for that procedure (either 140ºF
or 120ºF).
5—Bypass mode. System will go into bypass mode
when the machine is left running and the trigger
gun is released. Bypass mode is when the inlet water
coming into the pump re-circulates through the
unloader across the pump head. If left in bypass too
long—more than one minute—friction created by the
movement of the water will begin to heat the water at
a rapid rate. If equipped with a bulk water tank, water
can be bypassed back through the tank allowing for a
larger volume of water to be re-circulated through the
pump head, thus reducing heat on the pump seals.
WARNING: Do not leave in bypass for longer than
one minute to prevent the pump from overheating.
Shut off the unit when not spraying water.
6—Perform appropriate decontamination protocol.
Shut down
WARNING: Cool down the burner before shutting
off the decontamination unit.
1—Turn the burner switch to the off position.
2—Squeeze the trigger on the spray gun until
the water becomes cool.
3—Turn the engine switch off.
4—Turn off water supply.
5—Squeeze the trigger to release any trapped pressure
in discharge hose.
6—Drain water out of the hose and roll up.
7—Disconnect attachments and store properly.

Chapter 6: Watercraft Decontamination Procedures

95

�What is included in the standard
decontamination protocol?
To ensure that zebra and quagga mussels and
other ANS are killed and removed, watercraft
decontamination protocols include:
Safety!
Keep staff and the public safe by wearing all personal
protective equipment including a heat resistant suit,
taking care to avoid slips, trips, falls, and burns. Use
caution when operating the high pressure spray wand.
LIFE
ARKS &amp; WILD
COLORADO P

Boater’s Guide to
Aquatic Nuisance
Species (ANS)
Inspections

cpw.state.co.us

Education
Explain to the
boater why
decontamination is
important and why
we are doing it. You
can direct them to
the Boaters Guide
to ANS Inspections
brochure and have
them read it in a
safe location while
you perform the
decontamination.
Removal
All mud, plants,
water, and
organisms must
be removed from
the vessel.

Decontamination
Thoroughly flush the interior compartments and
spray the exterior of the watercraft with hot water.
• All discharge ports or through hull fittings must
be flushed with 120ºF water at low pressure for
one minute or until the water back flushes.
• All interior compartments that may hold water,
including, but not limited to: live/bait wells,
ballast, bilge areas and intakes must be flushed at
low pressure with 120ºF water.
• If a bilge pump is present, then it must be run
until the bilge appears to be empty.
• The lower unit of the engine should be thoroughly
flushed with 140ºF water at low pressure until
exiting water temperature is 140ºF.
•      The gimbal area must be sprayed with
low pressure 140ºF water for 2 minutes.
•      The exterior of the watercraft and trailer
must be thoroughly decontaminated
with 140ºF water with low and high
pressure.
When doing a full decontamination for
suspect or known ANS, be sure to fill out all
required paperwork, take photos before and
after decontamination, collect samples, and
do a thorough inspection both before and
after the decontamination.

96

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Bait
Depending on the location and type of live
aquatic bait, the inspection or treatment will
vary. See the bait treatment section on page 110.
Report
Report a mussel boat to your supervisor.
Inspectors must report all suspect mussel boats
and/or full decontaminations to the CPW
ANS Program office immediately. Inspectors
must also fill out the full decontamination
workflow in the data collectors and submit that
record electronically at the time of interception
and/or decontamination. Photos must be
emailed and samples mailed with paperwork
to the CPW ANS Lab within 48 hours.
Colorado Parks and Wildlife
Aquatic Nuisance Species Lab
6060 Broadway, Denver, CO 80216
Email: Invasive.Species@state.co.us
Phone: 303-291-7295
All other decontaminations are documented in the
Data Collectors or the Activity Log.
Seals and Receipts
If the boat is leaving your site following any
decontamination, apply a green seal and give the
boat operator a seal receipt. Provide the boater with
the pink copies of paper forms to document the
decontamination. Write in notes section if anything
wasn’t working—for example, if a flush wasn’t done
because the engine battery was dead.

What is the protocol for standing water
decontaminations?
Zebra and quagga mussels start off life as microscopic,
free-floating organisms called veligers that are too small
to see with the naked eye. They can be transported to
new locations in standing water in live wells, bilge areas,
and other interior compartments on boats. Mussels
aren’t the only unseen invasive species. Others, such as
the waterflea, are also microscopic and transported
in water from the lake or reservoir.
Small plant fragments that get sucked
up in water onto the boat could start
a new infestation in another lake.
To prevent the overland movement
of all invasive species through
standing water on boats, the lake

Chapter 6: Watercraft Decontamination Procedures

97

�Be extremely cautious with OUT OF STATE BOATS
because some other states do not have extensive
sampling programs focused on early detection.
We do not know which lakes are or are not infested
in those states. If a watercraft from out of state has any
standing water that can’t be removed (e.g. unverifiable
water) it must get a minimum of a standing water
decontamination.

What is the protocol for
standing water decontaminations? (cont.)
or reservoir water must be fully drained out of the boat
in between each use. If the standing water cannot be fully
drained, the compartment needs to be decontaminated.
This protocol is used to force infested water out of the
boat while killing veligers and other ANS in the water.
The water must reach 120ºF coming out of the boat for
interior compartments, or 140ºF for engines and motors.
The high pressure wand is never used in this protocol.
If boats have been drained to the fullest extent possible
and still contain standing water in the bilge, ballast tanks,
live/bait wells, or engines, then you will need to follow
the rules below to determine if decontamination is
required.
• A boat from suspect, positive or infested water that
was not decontaminated upon exit and has ANY
standing water present, must be decontaminated.
This includes water in ballast tanks, inboards, and
I/O engines.
•      For an undocumented boat (no seal and receipt)
with unverifiable water (ballast tanks, inboards and
I/O engines), a standing water decontamination is
required.
• Colorado protocol requires that watercraft must be
clean, drained and dry before it is allowed to launch
into waters of the state. If a boat has small amounts
of standing water and the boat has not been in
suspect, positive or infested waters, inspectors must
still remove the water from the boat. The inspector
should have a small pump and sponges/towels
available at the inspection station to assist with
the draining of boats. If using these tools does not
ensure a fully drained vessel (e.g. gravity emptied live
wells with long discharge hoses) then the interior
compartments with water remaining should be
flushed with 120ºF water.
98

Interior compartments that may hold water, including,
but not limited to live/bait wells, ballast, anchor
compartments, bilge areas and their corresponding
intake ports, must be flushed with 120ºF water at low
pressure. This can be accomplished by using the diffuser
attachment.
Due to research findings about ballast, bilge, and
live/bait well pumps it is important to adjust the
temperature of the decontamination unit to 120ºF to
ensure that no damage is done to the pump during the
decontamination process.
Note: Prior to decontaminating interior compartments
with pumps, be sure that you have tested the temperature
of the water to ensure that your unit is operating at 120ºF
and verify using a digital thermometer that the water
reaches 120ºF exiting the boat. Engines and motors are
flushed using 140ºF low pressure hot water.
What are pump temperature ratings?

Pump manufacturers were consulted during the
drafting of these procedures. In rare occasions, marine
transfer pumps could be damaged by the use of hot
water temperatures during the decontamination
process. More research is needed in this arena. The
following is a list of some popular manufacturers,
pump types and their recommended temperature
ratings. Due to the complexity of pumps and the
various brands and ratings, it is required that interior
compartments are decontaminated at 120ºF with low
pressure.
Pump Temperature Rating Table
Manufacturer

Temperature Rating

Atwood Corporation

130ºF
170ºF

Johnson Pumps of America
SHURflo Pumps
ITT Manufacturers

Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

140ºF
120ºF

�Step-by-Step Procedure for
Standing Water Decontaminations

Standing Water Decontamination of
Interior Compartments
1—Follow the standard operating procedures for your
decontamination unit.
• Check all fluid levels of the decontamination
unit. With the trigger squeezed, start the unit
and purge the water until it runs clear.
2—Turn on the burner, and measure the temperature
of the water.

• 120ºF exit
temperature
• Low pressure

3—Start the decontamination by placing the tip of the
wand (nozzle removed) or the diffuser on the through
hull discharge port(s) and flush this for one minute
or until the water back flushes. Diffuser attachment
shown.
4—Turn off the decontamination unit by turning the
burner off first and then turn off the key so that the
unit does not stay in the bypass mode too long while
you are climbing into the boat to flush the interior
compartments.
5—Next, have the boat operator open all interior
compartments that need to be decontaminated and
remove plugs. Restart the decontamination unit and
flush the compartment. Use a thermometer and
measure the temperature at the through hull discharge
port for that compartment. Continue flushing
until the exit temperature of the water is 120ºF.
Be sure to keep the tip of the attachment close to the
sides of the compartment to prevent temperature loss.
Start at the bow of the boat and work your way to
the stern.
6—If equipped, have the boater turn on the discharge
pump for the compartment.
7—Turn off the decontamination unit when
you have completed decontaminating all necessary
interior compartments. Turn the burner off first, run
some water through the boiler and then turn off the
key. Follow the standard operating procedures for
shutting down your decontamination unit.
8—Submit a completed electronic record in the
Data Collector or on the paper Activity Log.
9—Remind the boater to dry and leave all water drain
plugs out during overland transport.

Chapter 6: Watercraft Decontamination Procedures

99

�Step-by-Step Procedure for
Standing Water Decontaminations (cont.)

Standing Water Decontamination of Outboard
Motors and Inboard/Outboard Engines

Outboard Motor

• 140ºF exit
temperature
• Low pressure

Inboard/Outboard Engine

All decontamination stations should have at least
two models of decontamination muffs; a type for
the newer Mercury engines that threads through the
intake ports that are completely open; and another
clamp style muff for all other engines.

The following photos show the use of the threaded
Mercury muffs.
1—Attach the hose to the end of the wand
(quick connect fitting).

2—Then attach the muff attachment to the hose.

100 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�3—Make sure the motor/engine is completely
lowered. Place the muffs so that all the intake
openings are completely covered. When threading
the Mercury muffs, place the wire through the center
opening to ensure all openings are covered.
4—Start the decontamination unit following the
standard operating procedures.
Note: If operating in colder climates, allow the engine to
warm up by running water through prior to starting the
burner.
5—Start the water by engaging the trigger. Check to
make sure the intake openings are still covered on
both sides and that the muffs are tight.
6—Stand clear of the propeller and have the boat
operator start the motor/engine in Neutral.
Note: If the engine is not uptaking water when it is
turned on in neutral, turn off the engine and decon unit,
and re-adjust the muffs.

7—Flush the engine until the water temperature is
140ºF when measured by a thermometer at the
discharge port(s).

8—Have the boat operator turn off the motor/engine.
9—Turn off the decontamination unit by turning the
burner off first, run some water through the boiler
and then turn off the key. Follow standard operating
procedures for shutting down your decontamination
unit.
10—Remove the muffs and allow the motor/engine
to drain; have boat operator raise and lower the
motor/engine twice.
11—Submit a completed electronic record in the
Data Collector or on the paper Activity Log.
12—If exiting, apply a seal and give the boater a
properly filled out receipt.
13—Remind the boater to dry and leave all water
drain plugs out during overland transport.

Chapter 6: Watercraft Decontamination Procedures

101

�Step-by-Step Procedure for
Standing Water Decontaminations (cont.)

Standing Water Decontamination of
Inboard Engines and their Bilges
Note: Most inboards, but not all, that have the engine in
the center of the boat do not have ballast tanks.

• Engine: 140ºF
exit temperature
• Bilge: 120ºF
exit temperature
• Low pressure

All inboard intakes, which are located on the bottom
of the hull directly under the engine, have a cover
over the opening that protects the engine from
sucking up large particulates. Some inboards have
a hose attachment in the engine compartment for
decontamination. However, this boat still needs to
have hot water flushed between the intake hull fitting
and the hose that connects to the engine for thorough
decontamination.

1—Attach the hose to the end of the wand
(quick connect fitting) and then attach the
fake-a-lake attachment.

2—The fake-a-lake must be placed snuggly against
the bottom of the hull covering the intake port
for the inboard.

102 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�3—Start the decontamination unit following the
standard operating procedures.
4—Start the water by engaging the trigger.
5—Stand clear of the propeller and have the boat
operator start the engine in neutral.
6—Flush the engine with low pressure water until the
exit temperature of the water is 140ºF when measured
with a thermometer at the discharge port(s).
7—Have the boat operator turn off the engine.
8—Turn off the decontamination unit by turning the
burner off first and then turn off the key.
9—Remove the fake-a-lake from under the boat;
disconnect the hose from the wand.
10—Flush the bilge with 120ºF low pressure water.
a. Make sure that the bilge plug, located in the
center access area, is in.
b. Add 4–5 gallons of water into the bilge
by putting the diffuser down behind
the engine next to the floor.

c. Then remove the bilge plug and continue to
flush until the exiting water reaches 120ºF.

Note: The auto float valve bilge pump will
come on if you exceed the allowable amount
for that watercraft.

11—Turn off the decontamination unit by turning
the burner off first, run some water through the
boiler and then turn off the key, and have the boat
operator run the pump to assist in water removal.
Follow the standard operating procedures for your
decontamination unit.
12—Submit a completed electronic record in the
Data Collector or on the paper Activity Log.
13—If exiting, apply a seal and give the boater a
properly filled out receipt.
14—Remind the boater to dry and leave all water
drain plugs out during overland transport.

Chapter 6: Watercraft Decontamination Procedures

103

�Step-by-Step Procedure for
Standing Water Decontaminations (cont.)

Standing Water Decontamination of Ballast Tanks
Note: Most inboards, but not all, that have the engine in
the center of the boat do not have ballast tanks.

• 120ºF exit
temperature
• Low pressure

1—Follow the standard operating procedures for your
decontamination unit.
• Check all fluid levels of the decontamination
unit. With the trigger squeezed, start the unit
and purge the water until it runs clear.
2—Turn on the burner, and measure the temperature
of the water.
Note: You must first identify which through hull fittings
are outlets for ballast tanks and then back flush. Be
aware that some through hull fittings for ballast tanks
have one way valves so if the water rushes back out, you
will not be able to perform the back flush.

3—Once the water temperature reaches 120ºF, start
the decontamination by placing the tip of the wand
or the diffuser on the through hull discharge port(s)
and flush this for one minute or until the water back
flushes.

4—Turn off the decontamination unit by turning the
burner off first and then turn off the key so that the
unit does not stay in the bypass mode too long while
you are changing the attachments.
5—Attach the hose to the end of the wand
(quick connect fitting) and then attach the
fake-a-lake attachment.

104 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�6—The fake-a-lake must be placed snuggly against
the bottom of the hull covering the intake port for the
ballast tank.

7—Start the decontamination unit and then start the
water by engaging the trigger.

8—Have the boat operator turn on the intake ballast
pump. Fill it up with low pressure or until the exit
water temperature reaches 120ºF. If there is no ballast
tank discharge pump, flush the ballast tanks with
120ºF water for at least 2 minutes.
If you have a “mussel boat” and are doing a full
decontamination, fill up each ballast tank to 100%
capacity and drain it twice with hot water at 120ºF.
All other scenarios, ballast tanks will be flushed until
the decontamination water temperature exiting the
watercraft is 120ºF.
9—Have the boat operator turn off the intake ballast
pump. Release the trigger to stop the water flow after
the pump is off.
10—Turn off the decontamination unit by turning
the burner off first, run some water through the boiler
and then turn off the key so that the unit does not stay
in the bypass mode too long while you are changing
the location of the fake-a-lake.
11—Have the boat operator turn on the ballast tank
discharge pump to drain the tank as much as possible.
12—Repeat these steps for every ballast tank.
13—Submit a completed electronic record in the
Data Collector or on the paper Activity Log.
14—Remind the boater to dry and leave all water
drain plugs out during overland transport.

Chapter 6: Watercraft Decontamination Procedures

105

�What is the protocol for plant decontamination?
True aquatic plants are defined as plants that are
• 140ºF exit
normally completely or mostly submerged in water and
temperature
are unable to survive for long periods outside of water.
• Low or high
Submerged aquatic weeds are commonly transported
pressure
via watercraft and trailers, usually by getting tangled
• 15 seconds
around motors, engines, and anchors. Most aquatic
weeds can establish new populations with only a tiny
fragment of the parent plant. Those tiny fragments
can be carried overland on watercraft,
trailers, anchors, fishing equipment, water
State ANS Regulation #803H prohibits the movement
ski equipment, etc. It is the inspector and
of watercraft overland with aquatic plants attached.
the operator’s responsibility to ensure
plants are not transported on boats.
“Upon removal of a vessel or other floating device from
During the entrance and exit inspection,
waters of the state, and before leaving the boat launch
any plant or plant fragment should be
or parking area, the operator is required to remove
hand removed and properly disposed of
aquatic plants and water drain plug(s). It is prohibited to
away from the lake or reservoir by the
transport a vessel or other floating device over land with
inspector or boat operator. However,
aquatic plants or water drain plugs in place.”
there may be a situation when plant
material is caught between the hull of
the vessel and the trailer bunk or roller, or is wrapped
around the propeller or transducer, and can’t be
completely removed by hand.
It is mandatory for the boat inspector to decontaminate
those areas of the vessel where the plant fragments
remain. Remember—heat kills.
Step-by-Step Procedure for
Plant Decontamination

1—Start the decontamination unit using the standard
operating procedures for your unit.
2—Apply low pressure 140ºF water directly to the
plants or plant fragments for 15 seconds.
3—Decontaminate areas where plants are located and
can’t be removed:

© MICHIGAN SEA GRANT

If plant material is found on a boat with ballast
tanks, the tanks must be flushed to eliminate possible
fragments within.
a. Trailer’s carpeted bunk. Use 140ºF water
at low pressure. Move the wand/diffuser
slowly along the length of the bunk. Keep the
tip of the wand/diffuser close to the bunk to
maintain an even temperature for at least
15 seconds.

106 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�b. Trailer’s frame, and rollers. Use 140ºF water at
high pressure. Move the wand/diffuser slowly
along the length of the trailer. Keep the tip
of the wand/diffuser close to the trailer to
maintain an even temperature for at least
15 seconds.
c. Propeller. Use 140ºF water at high pressure.
Be thorough and remove 100% of the
plant material. In order to avoid excess
splashback when decontaminating the propeller,
the decontaminator can turn the wand handle
one quarter turn away from him/herself to
lower the pressure.
d. Transducer. Use 140ºF water at low pressure.
The wiring and “water wheel” attached to this
instrument dictate that low pressure is used
in order to prevent damage.
e. Interior compartments. Follow standing water
decontamination protocol.
4—Turn off the decontamination unit by first turning
off the burner, engage the trigger to run water through
the burner to cool it, and then turn off the key. Follow
the standard operating procedures.
5—Submit a completed electronic record in the
Data Collector or on the paper Activity Log.
6—If exiting, apply a seal and give the boater a properly
filled out seal receipt.
7—Remind boater to dry and leave all water drain
plugs out during overland transport.
Note: If a boat from a reservoir/lake that is not known
to be positive for that plant species (Eurasian watermilfoil
for example) comes to your station and has plant
material that you believe is an ANS, please take a
sample following the protocol on the page 4 (ANS)
Documentation and Vessel Decontamination Form:
Specimen Collection and Shipping Instructions
(see page 123).
Send plant samples to:
Colorado Parks and Wildlife
Aquatic Nuisance Species Lab
6060 Broadway, Denver, CO 80216
Email: Invasive.Species@state.co.us
Phone: 303-291-7295
Remove all plant material and dispose of it in the trash.
If a complete removal is not possible, decontaminate
the sections of the watercraft that are affected.
Chapter 6: Watercraft Decontamination Procedures

107

�What are the Colorado regulations
on live aquatic bait?
Colorado Parks &amp; Wildlife regulations require that
all live aquatic bait must be purchased from an
authorized Colorado bait dealer
and must be accompanied by a
dated receipt. The receipt is valid for
ANS inspections for seven days.
• Live fish are only allowed for
use as bait on the East of the
Continental Divide below 7,000
feet and at Navajo Reservoir.
• In those areas, the
transportation of live
fish as bait is prohibited between waters
unless it was purchased from a Colorado
bait dealer, as described above.
• Fish harvested in the wild for use as
live bait can only be used in the water
in which it was caught and cannot be
transported or stored for later use.
• The exception is fish harvested within
Baca, Bent, Crowley, Kiowa, Otero,
or Prowers counties which can be
transported and used only within those
six counties.
• The transportation of live crayfish is prohibited
West of the Continental Divide and from
Sanchez Reservoir.
• It is unlawful to transport live bait across state
lines without an importation permit.

© PHIL MYERS, MUSEUM OF ZOOLOGY, UNIVERSITY OF MICHIGAN

What is the protocol for
live aquatic bait treatment?
If a vessel has live aquatic bait in a container or a well
with standing water, be sure to accurately record the
bait in the Data Collector or Activity Log. Then ask
the boater for a bait receipt.
Remember: Under Colorado Fishing
Regulations only live fish bait mandates
a receipt that lists the name of the bait
and the quantity/number. Other live
aquatic bait (e.g. crayfish, salamanders,
etc.) may only have a basic store receipt
without that information.
In places where live bait is allowed,
the inspection or treatment will vary
depending on the location and type of
bait.

© John Woodling

108 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�If the boater has bait in a container with standing
water, allow them to proceed and launch with the
bait if the following three items are all true:
• The receipt is from a Colorado bait dealer and
• The receipt is dated no more than seven days
and
• The species listed on the receipt matches up
with the bait in question.
If the receipt is older than seven days, perform a
bait treatment to remove the threat of ANS in the
bait water. Ask the boater to remove the bait from
the vessels live well or container and place it into a
holding container. The live well or container must
be drained and decontaminated using standard
decontamination procedures (120ºF hot water rinse
with low pressure) before the bait is returned.
If entering, the container or well water can be replaced
with water from the lake or reservoir the boat is
launching in.
If the boater DOES NOT have a receipt the live
aquatic bait will not be permitted for use and will
have to be properly disposed of in the trash. However,
the following scenarios will result in the bait being
allowed following a treatment:
• If the bait is fish and was harvested within 1⁄ 2 mile
of the reservoir from man-made ditches or canals.
• If the bait is fish and was harvested within the SE
six county exemption.
• If the bait is wild harvested non-fish bait (crayfish,
frogs, or salamanders).
Out-of-state bait is not permitted for use.
When the boater leaves your waters, encourage them
to properly dispose of bait in the trash, never in the
water. Completely drain the live/bait well and any
other containers. You may need to sponge or hand
pump the water from the live/bait well out so that no
water leaves your site.
Note: Any live aquatic bait purchased from an outof-state dealer is illegal and must be disposed of in the
trash. Do not allow it to be used at your water body.

What options does the angler have if the live
aquatic bait is not allowed? If the live aquatic bait is
not allowed, the angler has a few options:
• Leave the bait in their car or truck.
• Dispose of the bait in the trash.
• Go fishing at a different lake or reservoir where
that bait is allowed.

Chapter 6: Watercraft Decontamination Procedures

109

�Step-by-Step Protocol for Bait Treatment

As much as possible, minimize transferring water to
the holding container. The live/bait well or container
must be drained and decontaminated using 120ºF
low pressure water before the bait is restocked in the
container that has been re-filled with water from the
lake the boat will be entering. If a decontamination
unit is unavailable or not working properly,
completely dry out the original container using a
paper towel or cloth. If exiting, do not allow water
from any reservoir, especially a containment reservoir,
to leave in a bait bucket or live well.

• 120ºF exit
temperature
• Low pressure

1—Using a net, transfer the
bait to a holding container
filled with reservoir water.
Minimize the transfer of
water from the original
container as much as
possible.
2—Drain the original container or compartment
(e.g. live well).

3—Follow standard operating procedures for your
decontamination unit.
• Check all fluid levels of the decontamination
unit. With the trigger squeezed, start the unit
and purge the water until it runs clear. Turn
on the burner, and measure the temperature
of the water.
4—Flush the live/bait well, compartment or container
with low pressure until the exit temperature of the
water reaches 120ºF. Be sure to keep the tip of the
attachment close to the sides of the compartment to
prevent temperature loss. If using the wand, be sure
to remove the nozzle so that you are using
low pressure.
• If there is a discharge pump for the live/bait
well, you can use a thermometer and measure
the temperature exiting the through hull
discharge port for that compartment.

110 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�5—Follow standard operating procedures for shutting
down your decontamination unit.
• Turn off the decontamination unit; turn the
burner off first, run some water through the
boiler and then turn off the key.
6—Whenever possible, water from the reservoir the
boat is entering should be used for restocking the bait.
Do not use tap water, as chlorinated water can
kill live aquatic bait.
7—If exiting, the container or well water will be
replaced with water from a sealed container or nonchlorinated source. Do not allow water from any
reservoir, especially a containment reservoir, to leave
in a bait bucket or live well.

8—Decontaminate all nets, buckets and equipment
used with low pressure 120ºF water at the end of the
procedure.
9—Submit a completed electronic record in the
Data Collector or on the paper Activity Log.

Full Decontamination for Suspect or
Known Zebra or Quagga Mussels
If you suspect that you have found
mussels or another ANS, or you
know you have a mussel boat, the
following are the steps that you
must perform to comply with
Colorado State protocol. Even if
only one single adult mussel shell is
found, the watercraft must get a full
decontamination according to this
protocol. Any evidence or suspicion
of adult or juvenile mussels requires
a full decontamination.
Remember it is required that you report, document,
collect, and decontaminate. Follow these
documentation and reporting procedures and do not
allow the boater to leave with mussels or other ANS
attached to the boat.
If a watercraft is highly encrusted with zebra or quagga
mussels, it can be quite difficult to effectively remove
all the mussels from the watercraft. It can take several
days for the dead mussels’ byssal threads to detach
and for gravity to pull them out of the watercraft.
Always try to remove all mussels from the watercraft
prior to releasing it. If a boat is too highly infested to
fully remove mussels at the inspection station, make
arrangements for the boat to be serviced at a certified
marina or marine business prior to releasing it. If the

• 120ºF low
pressure in interior
• 140ºF low pressure
on engine
• 140ºF high pressure
on exterior

boat owner is not cooperative,
you will need the assistance of
law enforcement to quarantine
or impound the watercraft
or escort it to a certified
marina or marine business to
ensure all mussels are dead, removed, and not being
transported illegally.
Report
Report your suspected ANS discovery immediately
by calling your supervisor and the State ANS Program
Office.
The initial report can be brief but should include the
following essential information:
• Date/Time
• Location—both the boat’s current location
and it’s history (e.g. waters visited in the last
60 days)
• Home state of the boat
• Location where the boat became infested
Chapter 6: Watercraft Decontamination Procedures

111

�Full Decontamination for Suspect or Known
Zebra or Quagga Mussels (cont.)
•
•
•

Suspected species of ANS
Name of Reporter (Inspector)
Name and contact information for the boat
owner and the boat operator (if different)

Document
1—Once mussels are found (or suspect mussels or
other ANS), a full decontamination is required. You
must first conduct a full inspection on the vessel to
identify all areas that are infested. You must fill out the
Data Collector record completely and accurately. Be as
detailed as you can and inspect every part of the boat.
2—Take digital photos of the entire boat before, during
(if possible), and after the decontamination. Always
have extra batteries ready for the camera, set the date on
the camera, and practice taking close up photos.
• Start taking photos at the watercraft
registration number and work your way
around the boat to end at the same registration
number. Note any damage or ANS on the
boat. If available, take a video of the boat while
you walk around it. Both video and photos are
desired. Photograph an overview of the entire
boat, the registration number, the rear of the
boat (to verify the name of the boat), and note
any areas where existing damage occurs on
the boat, and the area(s) of the boat where the
specimen is detected. End with a photo of the
registration number. The standard number of
photos is 10, but there is no maximum.
• For boats with gimbals (inboard, inboard/
outboard, stern drives, etc.) get good photos of
gimbal boots from several angles to document
the before and after condition.
• Take digital photos of the ANS specimen.
Take both far away and close up photos of
the specimen on the boat. Take photos of
where the specimens are located on the boat.
There may be numerous places, so be sure
to photograph each location. Change your
camera setting to close up mode (icon is a
flower) and then take close up photos. If
specimen is a zebra or quagga mussel, try to
get a good close up photo of the byssal threads.
Next, place a common object such as a pencil
or penny next to the specimen and photograph
the combination to show the relative size of the
specimen.

You must photograph the watercraft after
decontamination in the same fashion and
same locations as you photographed the boat
before the decontamination.
3—In the Data Collector, be sure to accurately
complete the data record for the full decontamination
and submit.
•

Be sure to document specifically where the boat has
launched, along with where it became infested and any
waters it has launched in since infestation. If it is not
known where it became infested, document all waters
the boat visited in the last six months. Record as much
information about the boat’s history as possible. Email
the photos and description to Invasive.Species@
state.co.us and call within 24 hours at (303) 291-7295.
Collect
After photographing the vessel, collect several samples
of the mussels or suspect ANS. Make sure the photos
are in focus and the suspect ANS is clearly visible
before the samples are detached from the boat. If
possible, take photos of the sample collection being
performed. Be sure to properly preserve the samples
following the instructions on the top of the ANS
Documentation and Vessel Decontamination Form:
Specimen Collection and Shipping Instructions (page
123) utilizing supplies from the CPW-provided
sampling kit. After the sample is removed, take photos
of the infested area. All samples and the white copy
of page 4 must be sent to the CPW ANS Lab within
24 hours.
1—Fill the vial halfway with 70% ethanol or grain
alcohol, not rubbing alcohol. Alcohol for samples
can be ordered through the program office. Even
trace amounts of chlorine from tap water, or
“de-chlorinated” tap water can completely destroy
sample DNA. Collect as many specimens as will fit
in the vial without it overflowing. It is ok to send more
than one vial.
2—Tightly seal the vial. Write the date, location,
and contact information on the vial’s label. If there
are numerous areas of attachment on the boat, take
samples from each of those areas as well.
3—Place the vials in a Ziploc® bag and wrap in bubble
wrap to help protect it during shipment.
4—Complete the lower half of the ANS Documentation
and Vessel Decontamination Form: Specimen Collection
and Shipping Instructions and place in the padded
envelop with the sample(s).

112 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�5—Overnight the envelope ASAP (within 24 hours) to:
CPW ANS Lab
6060 Broadway
Denver, CO 80216
6—Email Invasive.Species@state.co.us or call 303-2917295 to notify CPW that the sample is being shipped.
Decontaminate
For a full decontamination, all parts of watercraft that
has come into contact with the water body must be
exposed to hot water at the appropriate temperature
and pressure to ensure the ANS are killed and removed.
All WID stations in Colorado have a decontamination
unit available. If you do not, and you know you have
a mussel boat, call your Supervisor and/or the ANS
Program Office for help and do not allow that boat
to leave without decontamination. If needed, ask a
qualified peace officer (Wildlife Manager, Park Ranger,
Sheriff, etc.) to escort the watercraft to a nearby
WID station or to quarantine the vessel until a
decontamination unit can be brought to you.

anchors, ropes, chains, gear, life jackets, fenders, sea
strainers, drift socks, and other equipment that has
come into contact with the water with 120ºF water at
low pressure.
M—Motor or Engine
The motor must be flushed with 140ºF water at low
pressure. The gimbal unit on an outboard or I/O
must also be soaked. The engine compartment for an
inboard must get a standing water decontamination.
E—Exterior
The hull must be first rinsed with 140ºF water at low
pressure to kill the ANS, and then sprayed with high
pressure to remove the ANS. The trailer must be
sprayed and carpets soaked with 140ºF water. If the
boat has an inboard engine, be sure to decontaminate
the prop, prop shaft, and prop shaft support.
Only certified individuals should operate
decontamination units. Personal and public safety
should always be top priority. Never allow a member
of the public, volunteer, or a non-certified employee
to decontaminate a boat. Be sure to document all
procedures used to decontaminate the boat, including
photographs or videos of the decontamination being
performed.
It is required that you decontaminate in the following
order:
a. Flush the Through hull discharge ports.
b. Flush the Interior compartments on the boat.
c. Flush the Motor/engine.
d. Rinse the Exterior of the boat and trailer with
140ºF water to kill the mussels or ANS.
High pressure spray the hull or infected areas to
remove the mussels or ANS.

Similar to inspection, it is critically important that you
perform full decontaminations in a standardized and
repeatable fashion every single time. Use the acronym
TIME to help you remember the order of a full
decontamination. Use your HEAD to inspect.
Take your TIME to decontaminate.
T—Through Hull Fittings
Flush all discharge ports with 120ºF hot water at low
pressure for one minute or until the water back flushes.
I—Interior Compartments
Bilge area and pump, live or bait wells and other
interior compartments must be flushed with 120ºF
water at low pressure. This includes soaking all carpets,
Chapter 6: Watercraft Decontamination Procedures

113

�Step-by-Step Protocol for
Full Decontamination

Once the inspector has reported the suspect or
known infected watercraft, completed the paperwork,
taken before photographs, and collected samples, the
watercraft is now ready to be decontaminated.

• 120ºF low
pressure in interior
• 140ºF low pressure
on engine
º
• 140 F high pressure
on exterior

1—Follow the standard operating procedures for
your decontamination unit. Check all fluids on the
decontamination unit to make sure it is ready to operate.
2—Connect the wand to the trigger to the hose. Start
the decontamination unit using the proper operating
procedures for your unit.
3—Check the temperature of the water and adjust
the temperature depending on the procedure being
performed at that time.
4—Before beginning decontamination, follow the
boat owner into the boat. Work with the boater
to prepare the interior compartments that need to
be decontaminated. With help of the boat operator,
identify the discharge ports for the interior
compartments.
Remember the acronym TIME to guide you through
the procedure:
5—T = Through Hull Fittings
Decontaminate the through hull discharge ports.
Press the diffuser up against the opening of the through
hull discharge ports and decontaminate each port
with 120ºF water under low pressure for one
minute or until the water back flushes. Turn off the
decontamination unit. (Turn the burner off first and
then turn off the key.)
6—I = Interior Compartments
Decontaminate the interior compartments.
Reposition the hose and wand to the forward interior
compartments. Start the decontamination unit and work
from the front to the back of the boat using low pressure
120ºF water to decontaminate every compartment that
has standing water or has equipment that has
come into contact with the water body.
• If the boat has an inboard/outboard or inboard
engine have the boater raise the lid of the engine
compartment and place the wand behind
the engine to decontaminate this area.
• Turn off the decontamination unit.
After all interior compartments have been
decontaminated have the boat operator activate
the pumps to drain the interior compartments
as much as possible.

114 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�7—M = Motor or Engine
Decontaminate the motor/engine. Turn the
temperature of the unit to 140ºF.
• Procedure for outboard motors and inboard/
outboard motors/engines.
• Have the boat operator lower
the motor/engine to a vertical
position. Attach the hose to the end
of the wand using the quick connect
fitting.
• Attach the muffs to the hose and
place over the intake holes on the
lower end of the motor/engine.
•

•

•

Start the decontamination unit and
start the water flowing through the
muffs. Check to make sure the intake
holes are completely covered. Have
the boater start the motor/engine in
Neutral. Run until the exiting water
reaches 140°F. Turn off the
decontamination unit.
The gimbal area of the inboard/
outboard engine must be soaked
for a minimum of 2 minutes (it is
important to do both a top flush and
a side flush to ensure 100% mortality)
with 140ºF water under low pressure
to ensure adequate exposure time.

Procedure for inboard engines
• Find the engine inlet. This intake
always has a screen cover and is
located directly under the
engine on the hull.

•

Attach the fake-a-lake to the hose.
Adjust the fake-a-lake so that it covers
the engine intake port.

•

Start the decontamination unit and
start the water flowing. Have the
boater start the engine in Neutral.
Run until the exiting water reaches
140°F. Turn off the decontamination
unit.

Chapter 6: Watercraft Decontamination Procedures

115

�Step-by-Step Protocol for
Full Decontamination (cont.)

•

Flush the bilge with 120ºF low
pressure water.
a. Make sure that the bilge plug,
located in the center access
area, is in.
b. Add 4–5 gallons of water into
the bilge by putting the
wand (nozzle removed)
down behind the engine next
to the floor.

c. Have the boat owner remove
the bilge plug and continue to
flush until the exiting water
reaches 120ºF. Don’t stand in
front of the discharge port—
be aware the auto flow will
come on.

•

On an inboard engine, the
strut bearing and the rudder
port must be decontaminated.
a. Flush the strut bearing
with low pressure. Remove
the adult mussels with plastic
scrapers and then flush with
low pressure 140ºF. Use high
pressure if attached mussels
are found.
b. Flush the rudder port.

116 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�8—E = Exterior
Decontaminate the hull and trailer. First, remove
adult mussels with plastic scrapers or other tools.
Next, rinse the hull and trailer with 140°F hot
water at low pressure to kill the ANS.
Connect the 40º nozzle with the quick connect to the
end of the wand so you can use high pressure spray
to remove the ANS. Start the decontamination unit.
Keep the wand at a 45º angle and work methodically
in one direction. Do not use the wand to “scrub” the
hull. Keep the tip of the wand approximately 6–12
inches away from the hull and trailer as you
move around the boat. Water temperature
decreases approximately 15 to 20º per foot of distance
when sprayed from a power nozzle.

WARNING: Use low pressure on all carpeted areas,
decals, electrical connections, gimbal area on the
inboard/outboard engine, interior compartments,
transducers, and depth sounders and their wiring.
On trailers, be sure to decontaminate the openings
of the tubular frames.
Turn off the decontamination unit. Turn the burner off
first, run some water through the boiler and then turn
off the key. Follow the standard operating procedures
for your unit.
9—The gimbal area of the inboard/outboard engine
must be decontaminated for two minutes with 140ºF
water under low pressure to ensure adequate exposure
time.

Chapter 6: Watercraft Decontamination Procedures

117

�Step-by-Step Protocol for
Full Decontamination (cont.)

10—Following full decontamination, give the boat
some time to fully drain. In most cases of badly
infested vessels, dead mussel shells will be released
from the vessel and will drain out in the water
following decontamination.
• If mussel shells are still coming out of the
areas draining or can be seen in interior
compartments, you will need to re-flush those
areas to remove all mussels.
• Some jurisdictions may require a mandatory
or voluntary dessication or drying time for
infested watercraft following decontamination.
The CPW ANS Program office will consult
with law enforcement on a case by case basis
to determine if a quarantine or impound is
necessary when documentation cannot be
achieved at the WID station.
11—Conduct a final thorough inspection of the vessel.
Be sure to check all areas that were previously noted
as infested prior to inspection. Also check all other
areas of the boat to be sure that there are no mussels
(dead or alive) remaining on the vessel. Be as accurate
as possible when checking the numerous areas of the
boat. If staff allows, it is preferable that the second
inspection following decontamination is done by
someone other than the person who did the initial
inspection and decontamination.

a. If there’s any evidence that mussels or other
ANS remain—begin decontamination again!
b. If it’s a highly encrusted watercraft you may
consider quarantining or impounding the
watercraft (if your legal authority allows for
that) to allow the byssal threads to release and
the mussels to be removed by subsequent
decontaminations. You may also want to
consider sending the boat with an escort to a
certified marine business for servicing. If the
boater is not cooperative with these options
and you feel they are necessary, you may
require the assistance of a qualified peace
officer to order the quarantine or escort the
watercraft to the dealer.
12—Within 24 hours—email the photos and mail
the samples to the CPW ANS Lab.
13—Apply a green seal and give the boat operator
the top copy of the seal receipt. Be sure to fill out all
procedures that were and were not performed on the
seal receipt. If this was an encrusted mussel boat write
“MB” in the upper right corner of the seal receipt.
14—Remind the boater to fully dry and leave all water
drain plugs out during overland transport.
15—Submit a completed electronic record in the
Data Collector or on the paper Activity Log.
16—If the boat is not being
launched at the station where
it was decontaminated, and
the destination is known,
send a Watercraft Movement
Notice using the Data
Collector.
17—If the boat has
launched in any waters since
becoming infested, notify
those lake managers or state
coordinators.

118 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Full Decontamination
Temperature and Pressure Table
Area

Temp

Pressure

Time

Hull- through hole ports

120◦F

Low

1 min

Interior Compartments,
carpeted areas, equipment

120◦F

Low

Motor

140◦F

Low

Gimbal

140◦F

Low

Hull, Trailer – to kill

140◦F

Low

Hull, Trailer – to remove

140◦F

High, 45◦
angle

Inboard – Prop Shaft support /
Rudder

140◦F

Low

Inboard Engine Compartment

120◦F

Low

Exit Temp

Reaches 140◦F
2 min

Plug, Fill with 4-5 gal of 120◦F
water, drain and flush till 120◦F on
exit

Standing Water, Plant, Bait
Decontamination Table
Time

Exit
Temp

Treatment

Location

Temp

Pressure

Standing water

Interior Compartments

120◦F

Low

Standing Water

Ballast Tank

120◦F

Low

120◦F

Standing Water

Engine

140◦F

Low

140◦F

Standing Water

Gimbal

140◦F

Low

2 min.

Plant

Carpeted bunks,
transducer

140◦F

Low

15 sec

Plant

Frame, Rollers, Prop

140◦F

High

15 sec

Bait -Entrance

Interior Compartments
or Live wells

120◦F

Low

Bait – Exit

No Decon – Boater must
bring distilled water

Chapter 6: Watercraft Decontamination Procedures

119

�What if the boater will not allow
an inspection or decontamination?
The goal is to gain the boater’s support for the
program and process. Do everything that you can
to get the boater’s approval to inspect the boat and
decontaminate. If the owner is unwilling to cooperate,
you will need the assistance of law enforcement
officers to order decontamination, impound, or
quarantine a boat.
Guidelines concerning impoundment
• If a boater is entering a water body and there is
no evidence of mussels or other ANS on the boat,
and the boater refuses an inspection, the boat
should be turned away but not impounded.
• If the boater is leaving a suspect, positive, or
infested water body and the boater refuses an
inspection, then the boat should be inspected
prior to launching in another water body. If the

•

boat owner is not compliant, call law enforcement
to impound the vessel until proper inspection
and/or decontamination can be performed.
If suspected or known mussels or other ANS
are present on a boat and the boater will not
consent to an inspection or decontamination, or
if decontamination equipment is not available or
working, then the boat should be impounded by
law enforcement until decontamination
can be performed.

Do not let an infested vessel leave the inspection
station without a law enforcement escort if
it is infested or you suspect it is infested!
If you are not able to detain the vessel until law
enforcement can arrive, be sure to have all of the
boater’s information and a physical description of
the boater, the watercraft, and the towing vehicle so
an officer can follow up.

120 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�What options does the boater have if the
decontamination unit is broken or if the WID
station doesn’t have a decontamination unit?
Possession of zebra mussels, quagga mussels or other
ANS is illegal. A boat is not allowed to transport zebra
or quagga mussels or any ANS. If there is a reasonable
belief that the watercraft has ANS present, call the
nearest peace officer (e.g.
Wildlife Manager, Park Ranger,
County Sheriff, etc.) and call
your supervisor. If zebra or
quagga mussels are confirmed,
do not allow the boat to leave
until law enforcement officials
arrive. Options include:
• Quarantine the boat
on site until a working
decontamination unit
can be brought there.
• Escort the boat to the
nearest decontamination
station.
• As an absolute last resort
for a boat with standing
water and no confirmed
or suspected mussels or
ANS, you could direct
the boater to the nearest
decontamination station,
although this option is not
preferred.
Watercraft inspection and
decontamination stations are
placed at various locations
throughout the state and
western U.S. For the most
updated list of these sites,
call (303) 291-7295 or visit
www.cpw.state.co.us.

Chapter 6: Watercraft Decontamination Procedures

121

�122 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�State of Colorado

Inspection/Sample #:

Water Code

Date (month, day, year)

Boat Registration Number

(ANS) DOCUMENTATION and VESSEL DECONTAMINATION FORM
Specimen Collection and Shipping Instructions

1. Collect specimen carefully to obtain entire organism. Use clean, sterile tools to prevent contamination.
2. Place specimen in screw-capped sample vials.
3. Immediately fill vial (with specimen) with 70% ethanol.
a. Only fill 50% of vial with 70% reagent alcohol to cover specimen and seal closed vial with electric tape to
prevent leakage.
Note: Trace amounts of chlorine from tap water, or “dechlorinated” tap water can completely destroy
sample DNA. Do not use formaldehyde.
4. Write the date, boat registration number and authorized location directly on the sample tube with alcohol resistant
permanent sharpie marker.
5. Place sample tubes in Ziploc bag and wrap in bubble wrap.
6. Place Ziploc bag and the completed form below in bubble mailer or padded box.
7. Overnight sample to CPW ANS, 6060 Broadway, Denver, CO 80216—ASAP (within 24 hours).
8. Email Invasive.Species@state.co.us to notify CPW that the sample is being shipped
9. If you have questions, call (303) 291-7295.
10. Remember to disinfect all collection tools by soaking them with 140ºF hot water or storing them in acidic acid or
vinegar solution.
t Remove bottom half of page and include in mailer with vials being shipped to CPW for analysis.

SUSPECTED (ANS) COLLECTION FORM FOR WATERCRAFT INSPECTION STATIONS
Authorized Agent’s Name:
Inspector ID Number:

Email:

WID Station Supervisor Name:
Phone Number:

Email:

WID Authorized Location Name:
Address:
Date and Time of Collection:

Watercraft Registration Number:

Trailer Plate Number:

Watercraft Green Seal Code:

REASON FOR COLLECTION (check all that apply)

❑ Visual ID of ANS

❑ Bumps on Boat/Trailer

❑ Zebra or Quagga Mussels Attached
❑ Plants on Boat/Trailer
❑ Unidentifiable Organic Material

LOCATION OF SUSPECTED ANS PRIOR TO COLLECTION

❑ Watercraft Hull
❑ In Lake/Reservoir

❑ Motor
❑ Other:

❑ Live Well

Date Mailed:

❑ Anchor

❑ Bilge

❑ Watercraft Interior

t Do Not Write Below Line: For Lab Use Only

Date Received at ANS Lab:

Unique ID #:

Date Identified:

Notes:

Technician:

Further Analysis Needed:

Collector Contacted with Results:
DISTRIBUTION:

White—Statewide Invasive Species Coordinator Colorado Parks &amp; Wildlife

Yellow—Inspection Location

Pink—Owner/Operater

4/2014

14-EB2-2422/3079-14

Chapter 6: Watercraft Decontamination Procedures

123

�Step-by-Step Instructions for
Winterizing Trailered Hydro Tek Units
Winterize the Decontamination Unit
1—Roll out six feet of pressure hose and hold the
trigger in the open position.

2—Fill the container with two gallons of antifreeze.

3—Start up Hydro Tek unit and run the pump
(no heat) until the colored antifreeze comes out of
the gun. Shut down unit as soon as antifreeze comes
out of the gun by following the standard operating
procedures.
Note: When switching the valve back to the water
supply for decontamination, it is possible to recycle the
two gallons of antifreeze which is in the machine and
hose before the water begins to flow.
4—Connect supply hose and store with trigger
in elevated position for winter to avoid antifreeze
siphoning out.
5—Be sure to drain the water tank at the end of the
season before storing in a secure location.

124 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Step-by-Step Instructions for
Winterizing Non-Trailered Hydro Tek Units
Winterize the Decontamination Unit
1—Pour a minimum of two gallons of RV/Antifreeze
into the holding reservoir.

2—Depress the trigger.

3—Turn on the unit (no heat) and run it until
antifreeze comes out through the trigger.
4—Store the unit with trigger in elevated position
above the reservoir.

To Operate a Winterized Unit:
Begin by recycling the antifreeze into a clean
container. When the water runs clear the unit is
ready to use. It may be possible to re-use
the antifreeze. A winterizing kit can also be
used. This kit allows the decontamination unit to
be winterized for protection. However, if it needs
to be used for a decontamination, the operator
just turns the yellow handle 90º, starts the unit
(no heat) and recycles the antifreeze back into the
red container. The unit is then ready to go. When
finished with the decontamination, the operator
turns the yellow handle back to the position shown
in the photo and runs the unit (no heat)
until the pink colored antifreeze comes out
of the spray gun.

Chapter 6: Watercraft Decontamination Procedures

125

�Decontamination Unit
Photo Glossary
Burner on/off switch—This switch activates the
burner to heat the water. Squeeze the trigger on the
spray gun and the burner will begin heating the
water. It will stop firing whenever the water spray is
off or if the temperature setting is exceeded. After
turning the switch off, be sure to run water through
the system to cool the boiler.
Choke—When first starting the decontamination
unit, pull the choke out and turn the key until the
engine starts. Push the choke in immediately after
the unit starts.

Diffuser—This attachment connects directly to the
spray gun and is used to decontaminate discharge
ports, soak carpeted areas on the boat and/or
trailer and standing water flushes for any interior
compartments. It provides low pressure and a
rubber tip to prevent scratching any surface.

Dual lance wand—This attachment connects directly
to the spray gun. The other end has a quick connect
fitting so that a nozzle or connecting hose can be
“quickly” attached by pressing down the outer
ring and pressing the “other half” of the quick
connect fitting into its center. The handle, when
turned clockwise, directs the water through the
lance with the quick connect fitting only. If a nozzle
is attached the water exiting the wand will be at
high pressure. The handle, when turned counter
clockwise, directs the water through both lances
and lowers the pressure of the water. A dual lance
wand can be used for low pressure standing water
flushes if there is no nozzle attached and the water is
exiting both lances.

126 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Fake-a-lake—This attachment is used for
decontaminating inboard engines and ballast tanks.
It has a telescoping leg and the hose attachment
threads into the connection on the “plunger,”
joining the fake-a-lake to the hose to the wand.

Hose for connecting attachments—This six foot
hose has a quick connect fitting that connects to
the end of the wand. The other end threads into
the fake-a-lake or muff attachments needed for a
decontamination.

Muffs—Muffs are used to decontaminate the lower
unit of an outboard motor or inboard/outboard
engine. The muffs pictured at the top of the photo
are used for all new models of the outboard motor
and inboard/outboard Mercury engines that
have open intake ports. The lower muffs are
used on all other outboard and inboard/outboard
motors or engines.
Nozzle and nozzle storage—The Nozzle Storage
area shows the degree of the nozzle written below
the nozzle and its spray pattern is shown above the
nozzle. The preferred spray pattern is 40º. Nozzle
color and degrees can vary by manufacturer.
A nozzle is attached to the end of the wand
with a quick connect fitting. Be sure the quick
connect “clicks” into place when attaching the
nozzle. Point the wand and nozzle towards the
ground when you first engage the trigger to start the
water. This is a safety issue and will ensure that no
one or nothing will be hurt or damaged if the nozzle
blows off the wand.
Note: All red colored nozzles (0º) have been removed
and should never be used for boat decontaminations.
The 15º nozzles are also not recommended.
Chapter 6: Watercraft Decontamination Procedures

127

�Oil dip-stick for the decontamination unit’s
engine—This should be checked prior to every use.
Use 30-weight detergent oil to keep the oil reservoir
topped off.

Oil dip-stick for the decontamination unit’s
pump—This should be checked prior to every use.
Pump oil is used to keep the oil reservoir topped off.

Quick connect fitting—This fitting comes in two
parts. The part that is attached to the end of the
wand has to have the external circle pressed down
before the “male” portion of the fitting can be
inserted. The external circle then must “click”
in place to make a proper connection.

Spray gun with trigger—This photo of the gun has
the trigger held open. The wand or the diffuser
attachment thread directly onto the gun.
CAUTION: The spray gun kicks back when the
trigger is engaged—hold with both hands.
Thermometer—Thermometers are essential to the
decontamination process. It is used to initially
test the temperature of the water prior to the
decontamination. It is also used to check the exiting
water temperature when performing a standing
water decontamination for interior compartments
and engine flushes.

128 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�Thermostat—The thermostat allows the water
temperature to be adjusted so that different
decontamination temperature protocols can
be adhered to by the inspector. Every machine’s
temperature is different depending on the altitude
of its location and the temperature of the water in
the tank. Be sure to test the temperature of the water
with a thermometer prior to beginning and during
all decontaminations.
Winterizing kit for trailered Hydro Tek units—This
kit allows the decontamination unit to be winterized
for protection. However, if it needs to be used
for a decontamination, the operator just turns
the yellow handle 90º, starts the unit (no heat) and
recycles the antifreeze back into the red container.
The unit is then ready for decontamination. When
finished with the decontamination, the operator
turns the yellow handle back to the position shown
in the photo and runs the unit (no heat) until the
pink colored antifreeze comes out of the spray gun.

Chapter 6: Watercraft Decontamination Procedures

129

�Chapter 6 Review Questions—Watercraft Decontamination Procedures
1. The goal of decontamination is to ______________ and ______________ ANS from a watercraft and trailer.
2. Although it is rare, we sometimes use chemicals to kill ANS during decontamination. True or False
3. What are the four types of decontamination and what are they used for?
1. _____________________________________________________________________________________
2. _____________________________________________________________________________________
3. _____________________________________________________________________________________
4. _____________________________________________________________________________________
4. Why is the location important when we perform decontaminations?
______________________________________________________________________________________
5. Put the following in the correct order when performing a full decontamination.
1. _______

a. Document

2. _______

b. Decontaminate

3. _______

c. Collect

4. _______

d. Report

6. According to the ANS protocols, which boat should get decontaminated?
a. A boat from a positive or suspect water from last weekend that is completely dry everywhere.
b. A boat from a positive or suspect water from 90 days ago with 2 gallons of water in an oily bilge.
c. A boat from a positive or suspect water from 21 days ago with standing water.
d. A boat from out of state that has no standing water.
7. When performing a flush of an I/O or outboard motor, always be clear of the prop and ask the boater to start
the boat in: (circle one) a. drive
b. neutral
c. reverse.
8. What are the temperature requirements for decontamination?
a. Interior Compartments = 100ºF; Exterior = 160ºF
b. Interior Compartments = 120ºF; Exterior = 140ºF
c. Interior Compartments = 140ºF; Exterior = 180ºF
d. Interior Compartments = 180ºF; Exterior = 200ºF

130 Official State Watercraft Inspection and Decontamination (WID) Protocols and Procedures

�9. What order is recommended for a full decontamination of a boat?
a. Hull, trailer, engine, back of boat, interior compartments, anchor
b. Through hull discharge ports, interior compartments, motor/engine, rinse exterior and trailer,
		 then high pressure hull and trailer.
c. Engine, trailer, interior compartments, hull, back of boat, anchor
d. Anchor, back of boat, trailer, hull, engine, interior compartments
10. How long do you back-flush discharge ports with low pressure, 120ºF water?
________________________________________
11. How long do you decontaminate plants with low pressure, 140ºF water?
________________________________________
12. How long do you flush the gimbal area with low pressure, 140ºF water?
________________________________________
13. How often do you need to start up and use your decontamination unit if not performing regular
decontaminations?
________________________________________
14. Which one of these boats does NOT get a mandatory standing water decontamination if they have no seal
and receipt? (circle one)
a. Ski boat with an inboard/outboard engine
b. Wakeboard boat with a ballast tank
c. Fishing boat with an outboard motor
d. Ski boat with an inboard engine
15. What attachment do you use to flush a ballast tank or inboard engine?
a. Diffuser
b. Dual Lance Wand
c. Fake-a-Lake
d. Engine muffs

Chapter 6: Watercraft Decontamination Procedures

131

�</text>
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