1.0 Introduction and Summary

The Langdon Lake subwatershed is located along the western boundary of the  Minnehaha Creek Watershed District (MCWD or District) and within the cities of Minnetrista and Mound.  The subwatershed includes Langdon Lake, Black Lake, and Saunders Lake. The eastern subwatershed is mostly developed, while the western, upper subwatershed contains areas of undisturbed or low-density development, including part of Gale Woods Regional Park and numerous wetlands.  Langdon Lake outlets by a storm sewer to Lost Lake, which then outlets by a channel to Cooks Bay of Lake Minnetonka. 

Langdon Lake does not meet its water quality goals.   No goals were established for the other lakes, and limited data is available to assess their water quality.   The fishery in Langdon Lake is low quality and dominated by rough fish.  Water clarity is turbid, limiting the growth of aquatic vegetation that in turn limits the fishery.  Numerous high-value wetlands are present in the subwatershed.

Over the next ten years, the District’s focus in the Langdon Lake subwatershed will be on protecting and improving water quality in the lakes and conserving ecological integrity within the subwatershed.  The following will be particular focus areas:

  • Minimizing impacts on water resources from future development through enhanced regulation that requires higher levels of pollutant removal and increased infiltration of runoff.
  • Investigating and improving water quality in Langdon Lake through additional diagnostic study and construction of improvement projects.
  • Conserving ecological integrity through Land Conservation Program activities in key conservation areas.