HORSESHOE LAKE IMPROVEMENT ASSOCIATION: Horseshoe Lake 2011-2013 APM Plan Implementation Project


Horseshoe Lake Improvement Association is sponsoring a 3-year project to implement approved activities from its Aquatic Plant Management Plan. Activities include chemical treatment and manual removal of HWM; annual pre- and post-treatment aquatic plant surveys; EWM weevil and wild rice monitoring; watercraft inspection program; public meetings and outreach; and annual reporting. The project requires the following project updates annually: technical report with subsequent year\2019s treatment plan and communication (i.e. meeting or letter) with lake group. Deliverables include aquatic plant survey results (spreadsheets and GIS maps); watercraft inspection data collection and SWIMS entry; I & E products; and Plan/strategy updates, as necessary. This information will be provided in an annual progress and final report with pre- and post-treatment monitoring results and treatment plan for the next year. Special Conditions: All monitoring and management should follow approved recommendations within the Horseshoe Lake Aquatic Plant Management Plan, WDNR\2019s Aquatic Plant Management in Wisconsin guidance, and/or Citiizen Lake Monitoring Network protocols, as specified by the Department. This scope summarizes the project detail provided in the application and does not negate tasks/deliverables described therein. Data, records, and reports, including GIS-based maps and digital images, must be submitted to the Department in a format specified by the regional Lake Coordinator.

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Aquatic Invasives Grant
Aquatic Invasives Control
Reports and Documents
This report discusses aquatic plant management activities completed by the Horseshoe Lake Improvement Association (HLIA) and Lake Education and Planning Services (LEAPS) during the 2014 season and provides a proposed hybrid watermilfoil (HWM) control plan for 2015. The 2014 treatment proposal provides the Association with the information needed to contract with a certified aquatic herbicide applicator to complete the necessary WDNR permitting and herbicide treatment.
Slide show of annual meeting
In 2006, the Wisconsin Department of Natural Resources identified the presence of Hybrid water milfoil (HWM) – a cross between Northern and Eurasian water milfoils (Myriophyllum sibiricum X Myriophyllum spicatum) in the lake, and the Horseshoe Lake Improvement Association (HLIA) has been actively managing to control this invasive exotic species since 2008. Following the 2012 fall HWM bed mapping survey, the HLIA, under the direction of Short Elliott Hendrickson Inc. (SEH), decided to chemically treat eight areas totaled 3.5 acres or 0.9% of the lake’s surface area (Figure 1). On June 10-11th, we conducted a pretreatment survey to gather baseline data from the scheduled treatment areas and to allow SEH biologists to finalize treatment plans. Following the June 17th herbicide application, we conducted a July 24th posttreatment survey to evaluate the effectiveness of the treatment. We also conducted an October 6th and 13th HWM bed mapping survey to determine where HWM control might be considered in 2014. This report is the summary analysis of these three field surveys.
Activities & Recommendations
Information and Education
APM Chemical Permit Request
APM Mechanical Permit Request
Grant Awarded
Watercraft Inspections Clean Boats, Clean Waters
Project Deliverable
annual summary reports and final report
Informational Meetings
Aquatic Plant Monitoring or Survey
Monitor Pre and Post Treatment