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Watercraft Inspection Numbers

Montana inspectors have stopped 12 boats with invasive mussels. The boats came from Arizona, Texas, California and the Great Lakes area. Most of the boats were passing through Montana destined for Idaho, Washington and Canada. 

When a mussel boat is discovered, the watercraft inspectors decontaminate the boat, lock the boat to the trailer and notify the state or province where the boat is destined. Six of the boats had been recently purchased from another owner.

Watercraft inspection stations will operate through the summer months and close between Labor Day and the end of October, depending on the location.  See CleanDrainDryMT.com for station times and dates of operation.

watercraft inspection station

Watercraft Inspection Station Numbers

46: Inspection Stations in Montana

50,495: Boats inspected from January 1 to July 17

12: Boats with invasive mussel detected.

 WIS Blackfeet Nation

Inspectors at watercraft station operated by Blackfeet Nation.


Comment on Response Plan

FWP is seeking public comment on two documents that would guide Montana’s response to the detection of invasive mussels.The public comment period for this public notice ends on Aug. 13.

Public comment can be submitted electronically or by mail to Fish, Wildlife & Parks, Fisheries Division, PO Box 200701, Helena, MT 59620. 


Panel Makes eDNA Recommendations

A panel of nationally recognized scientists in the field of environmental DNA (eDNA) convened in April to make recommendations that will guide the use and development of eDNA testing for the early detection of invasive mussels. 

The use of eDNA is a rapidly evolving technology in need of standardized scientific protocols for the sampling, analysis, communication and verification of test results.

Information about the panel recommendations can be found at the DNRC-MISC web page.


AIS Laboratory

The AIS Laboratory analyzes water samples to detect the presence of invasive quagga or zebra (dreissenid) mussel larva called veliger.  Because veligers are microscopic in size the samples are viewed under a microscope using a process called cross-polarized light microscopy. 

FWP monitoring crews and other partner organizations use a plankton tow net to collect water samples during the summer months. Samples from high-priority areas can be processed within two weeks. If the lab detects a dreissenid veliger, the water sample is shared with two independent labs for verification. 

AIS Lab Timeline

  • 2005 - Lab in Helena established in cooperation with the Missouri River Basin Panel and the U.S. Fish & Wildlife Service.
  • 2005 – Processed 48 samples.
  • 2015 – Processed 688 samples.
  • 2016 – Processed 610 samples.
  • 2016 – Mussel veligers detected in Tiber Reservoir and suspected in a sample from  Canyon Ferry Reservoir.
  • 2017 – Processed 1,670 samples. No mussels detected.
  • 2018 – Processed 402 samples as of July 14. No mussels detected.


 Monitoring for AIS

FWP monitors for all aquatic invasive species, including zebra and quagga mussels, Asian clams, New Zealand mudsnails, Eurasian watermilfoil, flowering rush, curlyleaf pondweed and other species not known to occur in Montana.

The monitoring and early detection efforts have increased steadily over the years but nearly tripled in 2017. Since there are a variety of aquatic invasive species, different sampling techniques are used to increase the likelihood of early detection. In 2017, a total of 260 waterbodies were inspected in Montana. 

 See the 2017 AIS Monitoring Report.

Monitoring Crew on Missouri River

AIS Monitoring crew on the Missouri River near Townsend in 2017.


AIS Curriculumfor High Schools

The Watershed Education Network (WEN) has developed a curriculum for high school science classes called the Columbia Headwaters Education Kit for AIS, or CHEK 4 AIS. 

WEN constructed an education trunk that includes all the supplies and gear needed to conduct the eight lessons. The curriculum meets the Next Generation Science Standards.  Learn more at montanawatershed.org.  


Big Sky Watershed Crops

The Big Sky Watershed Corps is a Montana Conservation Corps program that places young professionals in Montana watershed communities to do research, project planning, education and community outreach. 

Casey Gallagher, Big Sky Watershed Corps member working with the Milk River Watershed Alliance, had an information booth at the at SUPfest at Bear Paw Lake near Havre. Stand up paddle boards are classified as a “watercraft” and SUP owners must follow the same rules as boaters, such as having a life jacket on board and stopping at watercraft inspection stations.   Casey also shared the Clean-Drain-Dry message at the Governors Cup Water Carnival near Fort Peck.

Casey Gallagher Big Sky Watershed Corps

Casey Gallagher shares the Clean Drain Dry message at SUPfest.


Upper Columbia Conservation Commission

Created in the 2017 legislative session by House Bill 622, UC3 was established to foster cooperation and coordination between international, federal, regional, state, tribal, and local water resource managers for the development and implementation of comprehensive Upper Columbia River Basin prevention and management measures to prevent the introduction and/or further establishment of AIS.

The mission of the UC3 is to protect the aquatic environment in Montana tributaries to the Columbia River from the threat of AIS in order to protect water resources, downstream interests, and the economic and ecological vitality of the region.

The UC3 is comprised of 9 appointed members as well as ex-officio federal agencies; they work closely with FWP and other AIS partners in Montana and throughout the region. Focus areas include education and outreach, expansion of AIS monitoring, and response preparedness The next UC3 meeting is September 26th in Glacier National Park.

UC3