FRIENDS OF DUTCH HOLLOW: Hybrid Watermilfoil Integrated Management

The Friends of Dutch Hollow Lake are sponsoring a project to control hybrid watermilfoil on Dutch Hollow Lake in Sauk County.

Activities: 1) Apply herbicide to 8.75 acres in Woodland Bay in 2026; 2) Perform 5 days of Diver Assisted Suction Harvesting (DASH); 3) Point-intercept aquatic plant surveys will take place in 2026 and 2027; 4) Fall milfoil bed-mapping surveys will take in 2026 and 2027.

Deliverables: 1) Treatment records will be submitted for the chemical and DASH control efforts; 2) Point-intercept survey results will be submitted to WDNR lakes biologist in excel format; 3)Maps created from milfoil bed-mapping survey will be provided to WDNR lakes biologist.

Conditions:

1) Point intercept surveys shall follow Recommended Baseline Monitoring of Aquatic Plants in Wisconsin: Sampling Design, Field and Laboratory Procedures, Data Entry and Analysis, and Applications, publication number PUB-SS-1068. Submit electronic point intercept data to this email address: DNRBaselineAquaticPlants@wisconsin.gov

2) Lake-wide point intercept surveys to be conducted between June 15 and September 15.

This scope summarizes details provided in the application and does not negate tasks and/or deliverables described therein. Data, reports, surveys, and supporting information, including photos, maps and GIS data, must be submitted to the DNR Biologist in electronic format and in any other format they specify.