Chain of Lakes Weed Control Activities

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Weed Control 

On the Huron River Chain of Lakes, aquatic invasive species are controlled by mechanical harvesting and the application of chemicals used for treating aquatic nuisance plants and/or algae.

Project Contractors

Learn more about the contractors you will see working on the lakes. Note: Please do not contact contractors directly about this project, all information is required to go through Washtenaw County.

Oakland Harvesters - Mechanical weed harvesting

Progressive AE  - Lake management/scientist

Clarke Aquatic Services - Herbicide applicator

A Guide to Using This Page

Below you can find the Treatment Maps for the lakes, canals and/or connectors on the Huron River Chain of Lakes. On each map, you will find GPS waypoints. These waypoints are reference numbers to help locate specific locations on a map. If you have an area of concern please provide your nearest GPS waypoint number or the location address. This will allow us to more effectively locate the concerned area.

Please reference these maps and the Aquatic Services online calendar below for herbicide treatment areas and the dates of application.

Click here for Aquatic Services' herbicide application online calendar 

Click here for the HRCOL Aquatic Herbicides and/or Algaecides Treatment Notice

Project Updates

Project updates for 2021 have been moved to the Chain of Lakes Archive Documents page.

Aquatic Plant Survey Maps

All Chain of Lakes Survey Maps

2022 Lake Maps - Treatments & Harvesting

Find treatment and harvesting maps below.

Baseline Lake

May 2022 Treatment Map

June 2022 Treatment Map

Baseline-Portage Connector

June 2022 Treatment Map

Gallagher Island Canals & Connector

May 2022 Treatment Map

June 2022 Treatment Map

Gallagher Lake

June 2022 Treatment Map

Little Portage Lake

May 2022 Treatment Map

June 2022 Treatment Map

Long (Loon) Lake

June 2022 Treatment Map

Portage Lake

May 2022 Treatment Map

June 2022 Treatment Map

Strawberry-Gallagher-Long Connector

June 2022 Treatment Map

Strawberry Lake

June 2022 Treatment Map

Tamarack Connector

May 2022 Treatment Map

June 2022 Treatment Map

Tamarack Lake

May 2022 Treatment Map

June 2022 Treatment Map

Whitewood Lake

May 2022 Treatment Map

June 2022 Treatment Map

Zukey Lake

May 2022 Treatment Map

June 2022 Treatment Map