3.1 Water Quality

  1. Painter Creek has total phosphorus and TSS concentrations that exceed the MPCA's ecoregion guidelines. Phosphorus loads in Painter Creek increase upstream to downstream, and dissolved oxygen can fall below the state standard during low flows.  Based on District monitoring data, it is estimated that Painter Creek contributes between one-third and one-half the total annual phosphorus load delivered to Jennings Bay, although its subwatershed comprises only 21 percent of the contributing area.  Improving Jennings Bay is dependant on reducing phosphorus load from Painter Creek. 
  2. The Painter Creek Feasibility Study identified a number of potential BMPs including wetland restorations and small-event creek diversions intended to spread flow out into wetlands and floodplains to allow natural vegetative and soil processes to reduce phosphorus loads. 
  3. The HHPLS did not identify specific phosphorus load reductions for the Painter Creek subwatershed, but identified BMPs that could be considered such as enlarging or dredging existing treatment ponds. 
  4. Rough fish in Katrina Lake and the creek and wetlands likely contribute to internal loading from sediments.
  5. Development, redevelopment, and reconstruction in the subwatershed will increase nutrient and TSS loads from the watershed as well as increasing the volume of stormwater runoff.