Dear Lake Minnewashta Residents and Supporters,
As part of our ongoing mission to protect and enhance the water quality and recreational enjoyment of Lake Minnewashta, the Lake Minnewashta Preservation Association (LMPA) will again be treating areas of the lake for aquatic invasive species (AIS) this year.
We want to keep you fully informed—this is your official notice that we will be conducting treatments in various parts of the lake starting in May.
Curly-Leaf Pondweed (CLP) Treatment
Our first treatment targets Curly-leaf pondweed (CLP), an invasive plant that grows in early spring and can disrupt water quality and recreation. Treatment areas may include locations within 150 feet of your shoreline, as identified by a recent survey conducted by the Carver County Water Management Organization.
We will be using EPA-approved aquatic herbicides Dibrox or Flumigard under a DNR permit. If your property is affected, shoreline signs will be posted with any applicable water use guidelines—though there are no restrictions on swimming or fishing after treatment.
This year, the DNR has approved an expanded treatment plan (see below):
- 51 acres of CLP will be treated in May (up from 40 acres in previous years)
- This is part of our 5-year plan to significantly reduce CLP levels
- A follow-up assessment will be conducted later in the season, possibly followed by a fall or winter treatment
If you do not want treatment to occur near your property (within 150 feet of shore), please notify us no later than May 6 by emailing info@lakeminnewashta.org. This deadline is important.
Native Aquatic Plants
Please note: the many plants you may have noticed in mid-to-late summer—such as Coontail, White Water Crowfoot, Bladderwort, and others—are native species and play a healthy role in the lake ecosystem. These will naturally return each season and are not part of our treatment plan.
Eurasian Watermilfoil Treatment
Later this spring, we will also treat Eurasian Watermilfoil, another invasive species, using the DNR- and EPA-approved herbicide 2,4-D, which has proven highly effective in past treatments. Treatment zones will be based on the most current surveys.
Float signs will be placed in the treated areas, and residents should refer to these for any water-use information. Restrictions are minimal with these products, but we encourage everyone to stay informed.
How You Can Help
These treatments are entirely funded by donations from generous LMPA members. If you’re a lakeshore property owner—or simply someone who enjoys this beautiful lake—please consider joining the LMPA or making a donation to support this important work.
Thank you for your continued support in keeping Lake Minnewashta clean, healthy, and enjoyable for everyone.
