MAHNOMEN COUNTY, Minn. — The Minnesota Department of Natural Resources has confirmed that zebra mussels have been found in South Twin Lake in Mahnomen County.
The White Earth Nation Division of Natural Resources was contacted after a lake user found what was later confirmed to be an adult zebra mussel along the southeast shore of the lake. White Earth staff found an additional adult zebra mussel on the opposite side of the lake during two days of follow-up field inspections.
Zebra mussels can compete with native species for food and habitat. They can also cut the feet of swimmers and damage motorboats and water intake pipes.
Regardless of whether or not a body of water is infested, Minnesota law requires boaters and anglers to take precautions to avoid further spread of invasive aquatic species.
The DNR extended its appreciation to the White Earth Natural Resources staff, as well as the lake user who brought the discovery to the attention of officials.
The DNR advises boaters to clean watercraft and trailers after each use, and to drain all water by removing drain plugs and keeping them out during transport. For small invasive species such as zebra mussels, it is also important to take one or more of the following precautions before moving to another body of water.
To remove zebra mussels, either spray items with high-pressure water, rinse with water that's 120 degrees for at least two minutes or dry items out for at least five days.