Pearl Lake (DNR ID 73-0037) is located in Stearns County (Figure 1-1), and is within the Upper Mississippi River Basin. The lake is within the North Central Hardwood Forest (NCHF) Ecoregion (Figure 1-2). Pearl Lake is a shallow, eutrophic lake approximately 750 acres in size, with a maximum depth of 18.2 feet and a mean depth of 8.2 feet. The littoral area (area with a depth of 15 feet or less) is approximately 510 acres. Pearl Lake currently supports a healthy fish community, and is managed for walleye and northern pike. Pearl Lake is currently listed on the Minnesota Pollution Control Agency's (MPCA) 2008 303(d) Impaired Waters List due to excessive nutrients (phosphorus) and requires a Total Maximum Daily Load (TMDL) report. Pearl Lake was first placed on the MPCA's 303(d) list in 2008. The target start date for the TMDL report is 2008, and the target completion date is 2010. The MPCA's projected schedule for TMDL completions, as indicated on Minnesota's 303(d) impaired waters list, implicitly reflects Minnesota's priority ranking of this TMDL. 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