Preventing Aquatic Invasive Species on Lake Owen

Prevention is the best strategy for keeping AIS out of Lake Owen and other area lakes.  Invasive plants, animals and pests are taking a toll on Wisconsin’s lakes, rivers and landscapes.  They cause damage to natural systems by displacing native species. Their aggressive growth creates mats of plants that inhibit navigation and make swimming, boating, and fishing unpleasant. Zebra mussels, a particularly, concerning AIS, can blanket shallow waters with sharp shells and attach to and cover docks, lifts, and boats. Once an AIS is established, it can be extremely expensive or even impossible to control. AIS such as Zebra Mussels and Eurasian Water Milfoil are present in nearby lakes and across MN and WI. To name just a few immediate threats: Zebra Mussels are found in Lake Superior and Big McKenzie Lake in Washburn County, and Eurasian Water Milfoil is present in Lake Namakagon and Lake Hayward.

Recommended AIS prevention is also the law in Wisconsin

Inspect boats, trailers, and equipment

Remove all attached aquatic plants and animals

Drain all water from boats, vehicles, and equipment

Never Move plants or live fish away from a water body

It is also important to let boats and equipment DRY in the sun for at least 5 days before using them in a different water body. Note:  it is not possible to drain all of the water from boats, and zebra mussel larva can live in remaining water for several days – especially in wake boat ballast tanks!

Clean Boats, Clean Waters staff monitor the Lake Owen public boat landings to encourage visitors to follow these important prevention steps. The Otter Bay sanitizing station is a Lake Owen Association effort.   In 2020, our monitors are adding safety procedures such as wearing masks and maintaining social distance to protect our lake visitors. We will also not be providing informational handouts for the time being.

BETTER strategy is to sanitize with a mild bleach solution (including in live wells, bilges, and ballast tanks) and let dry for at least 10 minutes.   There is a self-service sanitizing station located at the private Otter Bay Landing for their visitors.

The BEST option is to use hot water and/or high pressure washing to remove AIS.   Hot water (140F) kills AIS, even the larval form of Zebra Mussels in 10 seconds. In more sensitive areas such as live wells, bilges, and ballast tanks, 120F water is used and held for a slightly longer period of time (2 minutes).  While the Lake Owen Association received approval from the US Forest Service to site our decontamination station along the road to the North Outlet Landing in 2020, we have been delayed due to COVID-19 concerns.

Wisconsin Department of Natural Resources grants support these activities.