INVASIVE SPECIES & MANAGEMENT
Aquatic Plant Survey and Management Plan
Half Moon Lake has contracted with Barr Engineering to conduct Plant Surveys and form Weed Management Plans for the lake. The following reports are the details of this work:
2026 - Eurasian Watermilfoil case of Half Moon Lake Rehabilitation District vs WI DNR - Attorney Document
2026 - Aquatic Plant Management Plan - Part 1 / Part 2
2026 - Aquatic Herbicide Application - Riparian Notification and Permit Application
01 Memo Proposed Half Moon Lake Fluridone Treatment Spring Growing Season 2026
05 Exhibit C Half Moon Lake Aquatic Plant Management Plan Jan 2026
11e Exhibit AD 05 2025 Proposed HML Fluridone Treat Spring Growing Season
11j Exhibit AD 10 Exhibit M 2024 Point Intercept Plant Surveys Fina
11k Exhibit AD 11 Strategic Analysis of Aquatic Plant Mgmt in WI 2019
2025 - Aquatic Herbicide Application - Riparian Notification and Permit Application
2025 - Aquatic Plant Management Plan - Part 1 / Part 2
2024 - Eurasian Watermilfoil Management Results - Report - Part 1 / Part 2
2024 October - Aquatic Plant Survey
2024 - Aquatic Plant Management Plan
2023 - Eurasian Watermilfoil Managment Results - Report
2023 - Aquatic Plant Management Plan
Zebra Mussels
In the fall of 2026, zebra mussels were discovered in Half Moon Lake on boat lifts. The mussels were taken to Polk County Land and Water, who came to the lake and found more zebra mussels on rocks. Land and Water staff sent pictures to Wisc. DNR, who officially confirmed the presence of zebra mussels in Half Moon Lake. There is no treatment available for these aquatic invasive species, although research is ongoing. Please see the following documents for more detail on Zebra Mussels:
Exotic Species
To avoid accidentally transporting invasive species to other waters, before launching a boat and after leaving the boat launch at the end of the day, boaters should: Inspect and remove aquatic plants, animals, and mud from boat and equipment before leaving the water access; Drain water from boat and equipment (motor, bilge, live wells, and bait containers) before leaving the water access; Dispose of unwanted bait in the trash; Spray/rinse boats and recreational equipment with high pressure and/or hot tap water; Dry boats and equipment thoroughly for at least five days before launching into a different water body.
