Thompson Lake is a highlight of Thompson County Park. But for the last few years, elevated levels of pollutants have dampened recreational activity on the lake.
Several studies of the sediment in Thompson Lake identified contamination with chemicals from now-banned asphalt driveway sealant products, chloride (from road salt) and petroleum products. The sediments exceed state requirements for some chemicals and may have acute and chronic impacts to human and sediment-dwelling organisms.
Dakota County is leading a project to clean up the lake, so families can better enjoy the spot as a great place to recreate. The county is putting $1.3 million into the removal of contaminated sediments and investing in the lake’s future protection with a stormwater management project that will clean water before it enters the lake.
The $2.02 million projects will be funded with the City of West St. Paul and the Lower Mississippi River Watershed Management Organization. Following the cleanup, the lake will be a better place to fish and explore other recreational activities, like canoeing.
Engineers will get the projects started by October 2018 and completed by spring 2019.
North Shelter not available to rent during construction
The North Shelter is not available to rent between Oct. 1, 2018 and April 30, 2019, to allow crews to work. However, the restrooms in the North Shelter will be kept open. Work crews plan to use up to half of the North Shelter parking lot for staging equipment.
Trail closures during project construction
The paved trail from Butler Avenue into the park will close for several months.
Trails on the north side of Thompson Lake and adjacent to the North Shelter will close during project construction.