3.1 Water Quality

  1. Many of the bays of Lake Minnetonka are near or better than their water quality goal, but three bays in particular have significant water quality problems: Halsteds Bay, Jennings Bay, and Stubbs Bay.   West Arm and Priest Bay also do not meet their goal and are influenced by the water quality in the upstream bays.
  2. A whole lake model is necessary to fully understand the complex mixing that occurs within the lake and between the bays and to better forecast water quality.
  3. No or limited data is available for smaller lakes in the subwatershed, including Peavey, Marion, Louise, Shavers, Forest, Galpin, and Lost Lake.
  4. Classen Creek conveys a significant phosphorus and sediment load to Stubbs Bay.
  5. Development, redevelopment, and reconstruction in the subwatershed are predicted to increase nutrient and TSS loads from the watershed as well as increasing the volume of stormwater runoff, potentially further degrading water quality downstream.