Southwest Wyoming Aquatic Invasive Species Information


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....

Public AIS Training at GR Game and Fish Office April 2018

​A huge thank you to the people who turned out for a free training at the Green River G&F Office to learn how to inspect watercraft to prevent the spread of aquatic invasive species (AIS) like zebra and quagga mussels. Mike Lucas, Ken Lavine, Bert Chew, and Jack and Jeanie Weimer finished the training and are ready to inspect watercraft. Green River AIS Specialist Wes Gordon conducted the training. There are still more trainings to come in May in Utah and Wyoming. Contact Wes for more information at 307-875-3223 or 

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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