3.1 Water Quality
- The water quality in Gleason Lake
since 1998 has consistently been scored in the C/D grade range on the
District’s annual lake report cards. The
mean summer 2004 total phosphorus concentration was 108 Mu-g/L, well in excess
of the District’s interim 80 Mu-g/L goal.
Based on this monitoring history Gleason Lake’s
water quality is not supportive of swimming. The proposed state standard for shallow lakes
is 60 Mu-g/L; the long-term goal for Gleason
Lake is to in the long
term achieve that standard or better.
Phosphorus loading reductions would be necessary to achieve either of
the desired interim or long-term goal in-lake phosphorus concentrations. Little or no data is available for Hadley,
Kreatz, and Snyder
Lakes. However, the Regional Team has recommended a
goal of 10 percent reduction in TP for these lakes.
- 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, potentially further degrading water
quality in Dutch Lake and streams and wetlands in the
- Gleason Creek conveys significant phosphorus and
sediment loads downstream, and dissolved oxygen can fall below the state
standard during low flows.
- The Gleason Lake Management plan identified some areas
of shoreline erosion on Gleason
Lake that could be
contributing to reductions in lake water clarity and increased pollutant