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October 31, 2019

Zebra Mussels Found in Lotus Lake

News release from the MN Department of Natural Resources

A water sample with zebra mussel larvae led to follow-up searches and confirmation of zebra mussels in Lotus Lake, located in the City of Chanhassen in Carver County.

Info Session December 9th

Experts from the Riley Purgatory Bluff Creek Watershed District and other local agencies will answer your questions and discuss zebra mussels on Lotus Lake, our next steps and management decisions, and what you can do to help.

Monday, December 9th
18681 Lake Drive E, Chanhassen


Five microscopic zebra mussel larvae, called veligers (VEL-uh-jers), were confirmed in a Lotus Lake water sample as part of early detection monitoring by the Riley Purgatory Bluff Creek Watershed District and Carver County. Five adult zebra mussels were found on a dock in another part of Lotus Lake during a follow-up search by specialists from the DNR, the watershed district and the county. 

Lotus Lake will be added to the infested waters list for zebra mussels, so that people who harvest bait, fish commercially or administer water use take necessary precautions. Other lake users should follow the same “Clean, Drain, Dispose” steps that are always legally required on all water bodies, regardless of whether they are on the infested waters list.

Lake property owners should carefully check boats and trailers, docks and lifts, and all other water-related equipment for invasive species when removing equipment for seasonal storage. It is especially important to follow Minnesota’s law and keep docks and boat lifts out of the water for at least 21 days before putting them into another body of water. Anyone transporting a dock or lift from a shoreline property to another location for storage or repair may need a permit, to help prevent the spread of aquatic invasive species.

The DNR recommends these steps for lake property owners:

  • Look on the posts, wheels and underwater support bars of docks and lifts, as well as any parts of boats, pontoons and rafts that may have been submerged in water for an extended period.
  • Hire DNR-permitted lake service provider businesses to install or remove boats, docks, lifts and other water-related equipment. These businesses have attended training on Minnesota’s aquatic invasive species laws and many have experience identifying and removing invasive species.

People should contact an area DNR aquatic invasive species specialist if they think they have found zebra mussels or any other invasive species.

More information is available at

Useful Resources: 



Help prevent the spread: clean, drain, dispose

(from the MN DNR website: Clean In Clean Out]

When boating or fishing in Minnesota, protect your waters by following state aquatic invasive species laws

1. CLEAN all visible aquatic plants, zebra mussels, and other prohibited invasive species from watercraft, trailers, and water-related equipment before leaving any water access or shoreland. 


2. DRAIN water-related equipment (boat, ballast tanks, portable bait containers, motor) and drain bilge, livewell and baitwell by removing drain plugs before leaving a water access or shoreline property. Keep drain plugs out and water-draining devices open while transporting watercraft.

Q&A – Boat draining, drain plugs, and bait container draining  PDF


3. DISPOSE of unwanted bait, including minnows, leeches, and worms, in the trash. It is illegal to release bait into a waterbody or release aquatic animals from one waterbody to another. If you want to keep your bait, you must refill the bait container with bottled or tap water.

KNOW THE LAW: You may not…

  • Transport watercraft without removing the drain plug.
  • Arrive at lake access with drain plug in place.
  • Transport aquatic plants, zebra mussels, or other prohibited species on any roadway.
  • Launch a watercraft with prohibited species attached.
  • Transport water from Minnesota lakes or rivers.
  • Release bait into the water.