Lake Demontreville And Olson Association

The Lake Demontreville and Olson Association is a 501(c)(3) formed in 1985 to preserve, protect and improve the water quality and shoreline health of Lakes Demontreville and Olson in Lake Elmo, Washington County, Minnesota. It monitors and controls aquatic invasive species including Eurasian watermilfoil and curly-leaf pondweed, runs a shoreline treatment program, and collects water clarity and sample data. It also runs Clean, Drain, Dry education for boaters and works with the Minnesota DNR, the Valley Branch Watershed District, Washington County and the City of Lake Elmo.

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