Kohlman Lake is currently listed on the Minnesota Pollution Control Agency's (MPCA) Draft 2008 303(d) Impaired Waters List due to excessive nutrients (phosphorus). Kohlman Lake is the most upstream of the four lakes that make up the Phalen Chain of Lakes in Maplewood, Little Canada and St. Paul, Minnesota. The lake has a surface area of 74 acres, a maximum depth of approximately 9 feet, and a mean depth of 4 feet. Most of the lake is less than 6 feet deep, with the littoral area covering the entire lake surface. Kohlman Lake is a fishing lake used primarily for motor boating, canoeing, fishing, picnicking, and aesthetic viewing. Kohlman Lake provides some limited wildlife habitat. The MPCA's projected schedule for Total Maximum Daily Load (TMDL) report completions, as indicated on Minnesota's 303(d) impaired waters list, implicitly reflects Minnesota's priority ranking of this TMDL. The Kohlman Lake TMDL was scheduled to begin in 2004 and be completed in 2008. Ranking criteria for scheduling TMDL projects include, but are not limited to: impairment impacts on public health and aquatic life; public value of the impaired water resource; likelihood of completing the TMDL in an expedient manner, including a strong base of existing data and restorability of the waterbody; technical capability and willingness locally to assist with the TMDL; and appropriate sequencing of TMDLs within a watershed or basin.
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Minnesota Pollution Control Agency (St. Paul, Minnesota)
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Minnesota Pollution Control Agency