Southwest Wyoming Aquatic Invasive Species Information

Photo: Lucy Wold, WGFD
AIS Crew Leader Jessica Warner for the Evanston area

Click here to learn about the Spring 2019 AIS watercraft requirements before launching your watercraft

April 13, 2019 is the official opening of watercraft inspection stations in southwest Wyoming

If you plan to enter the state outside of the hours posted on our website, please plan ahead and arrange an inspection with a private inspector prior to your arrival.There are numerous watercraft inspection sites and authorized inspectors in southwest Wyoming. Please click this link here to learn where you can go to get your watercraft inspected BEFORE LAUNCHING.

Watercraft inspection training offered to public

Would you like to become certified to inspect your own watercraft for aquatic invasive species or to provide a service to your customers? If so, you’re in luck!

The Wyoming Game and Fish Department is offering nine watercraft inspection training courses across the state, and one in Nebraska, for members of the public. There are two training courses in southwest Wyoming; one in Evanston on March 23, at the Uinta County Library, 701 Main Street, from 9 a.m. to 4 p.m. The second in Green River on April 27, at the Green River Game and Fish Region Office, 351 Astle Avenue, also 9 a.m. to 4 p.m.

The watercraft inspection training will provide participants the skills necessary to inspect their watercraft and certify participants to inspect other watercraft in Wyoming to prevent the spread of aquatic invasive species (AIS). The training includes information on basic biology, impacts, transport vectors and distribution of AIS, and classroom instruction, a question and answer session, and a hands-on watercraft inspection exercise.

Wes Gordon, Green River AIS Specialist, said that anyone transporting a boat into Wyoming March 1 through November 30, from out of state, is required to get the watercraft inspected for AIS before launching that watercraft in Wyoming. “Being able to certify and seal your own watercraft is very convenient and allows boaters to hit the water right away after entering the state,” Gordon said. “Please remember that if you pass an open watercraft check station on your route of travel, you are still required to stop. Our staff will quickly verify your seal is valid and send you on your way. In addition, local companies who cater to watercraft users can become certified to inspect watercraft through this training and then can provide and charge customers for these services.”

The training is free and open to anyone interested in preventing the spread of AIS through watercraft inspection. Each class is limited to 20 participants.

To register for the class, or for more information, call Wes Gordon at 307-875-3225, extension 18622, or register online at .

Aquatic Invasive Species check stations close for the season

The 2018 boating season is winding down and Wyoming Game and Fish Department Aquatic Invasive Species (AIS) check stations throughout the state are set to close. Here are the closing check stations and respective dates for southwest Wyoming:

Evanston Port of Entry – September 15
Anvil Draw (Flaming Gorge) – September 15
Firehole (Flaming Gorge) – September 9
Kemmerer Ranger Station – September 15

The Evanston Port of Entry will be open when an inspector is available through the end of November.  Call ahead to make sure an inspector is available and/or to schedule an appointment. 307-677-1238 or 307-875-3225 extension 8622.

Green River AIS Specialist Wes Gordon says that it’s important to remember any conveyance being transported into the state of Wyoming is required to be inspected before launching on any water in the state until after November 30th. “This requirement is extended year-round if the conveyance was last used in any water infested with zebra and or quagga mussels,” Gordon said. “Please remember to stay vigilant and to clean, drain, and dry your watercraft after every use. Additionally, be sure your plugs and other water barriers remain out and/or open during transport.”

For a list of infested waters visit:

For a list of inspection locations and private inspectors visit:

Aquatic invasive species are non-native organisms that can cause significant harm to an
ecosystem when introduced. Aquatic invasive species, like zebra and quagga mussels, are small organisms that could have huge impacts for Wyoming's waters, boaters, and anglers.
They can ruin fisheries, clog cooling systems in motorboats, foul hulls, and ruin equipment
Anyone who uses water or recreates on water will be impacted.

For more information please call Gordon at the Game and Fish Green River Office, 307-875-3225, extension 8622.

​Waterfowl hunters can help stop the spread of Aquatic Invasive Species



     Many people associate the threat of spreading AIS with activities such as boating and fishing; however, hunters are also at risk of moving aquatic invaders from one body to another! Please click here for detailed information on how you can reduce the rist of moving AIS if and when you go waterfowl hunting....


 Jeanie (above) Ken and Wes (above) and Ken, Jack, Mike, Ken and Bert practice finding AIS on a boat

WGFD Southwest Aquatic Invasive Species (AIS) Specialist Wes Gordon inspects a lot of boats! Every state with AIS, or with neighboring states that do have AIS, are working really hard to keep invasive species like zebra and quagga mussels out of their waters. They cannot do that without your help! Drain, Clean and Dry your watercraft after every use.

Wes put together the short video below to inform you of the WGFD watercraft inspection station requiremtns for Fall 2018 and Winter 2019. If you want any information and you just don't see it on this website please feel free to call Wes at the Green River Game and Fish Office at 1-307-875-3223. 



Green River Region AIS Specialist Wes Gordon talks to Monroe Intermediate School about AIS in Wyoming and what they can do to keep them out of Wyoming waters. Thank you Justin Lamb (teacher) for taking the photos of Wes!

Photos: Lucy Wold, WGFD
Wes Gordon, Southwest Aquatic Invasive Species Specialist and volunteer Cliff Pabst install a sign near the boat launch at the Sweetwater County Picnic Grounds. The sign should remind all watercraft users to Drain all the water from their vessel, Clean off all of the vegetation, and Dry the vessel to ensure any aquatic invasive species are removed.

Southwest Aquatic Invasive Species Coordinator Wes Gordon conducts a water quality sample on Flaming Gorge Reservoir. The sample will be sent to a laboratory to check for the presence of zebra or quagga mussel veligers.

Evanston AIS Coordinator Jessica Murray throws the plankton tow net to sample for aquatic invasive species on Flaming Gorge.

This is what zebra and quagga mussels look like when they become attached to an object.



Wes Gordon inspecting a boat at the Green River Game and Fish Office, working to keep aquatic invasive species like zebra and quagga mussels out of Wyoming waters. Drain, Clean and Dry your watercraft after every use. Thank you!

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