Lake Demontreville and Olson Assn

…preserve, protect, and improve water and shoreline health

Clean, Drain, Dry Instruction video

MN DNR Boat and Water Safety

Protect our Lakes

The Lake Demontreville and Olson association (LDO) was founded in 1985 with a primary focus of maintaining water levels. In 1987 the Valley Branch Watershed District completed 1007 project managing water levels across the Tri-Lakes area and Washington County.
The LDO is now a IRS approved 501(c)(3) organization focused on managing the Invasive Species in the Lakes and monitoring the water quality.

Our Sponsors and Supporters

City of Lake Elmo

Minnesota Aquatic Invasive Species Research Center

Valley Branch Watershed District

Washington County


PLM Lake and Land Management Corp