Wisconsin Department of Natural Resources
Proposed NOR Sissabagama Lake 303d evaluation - Continued
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Project Description: Sissabagama Lake (Sawyer Co.) has an average total phosphorus concentration of 25 ug/l which exceeds the WisCALM threshold of 20 ug/l for a seepage lake for 303d listing. It is not known whether there are contollable TP sources in the lake's watershed. Monitoring will be done to determine if there are controllable TP sources and whether the lake should be added to the 303d list. Monitoring and evaluation includes: 1. Analyze existing in-lake and cranberry bog discharge data. Evaluate the significance of internal TP loading. Develop a TP model for the lake. 2. Two watershed stream sites will be sampled for TP on 6 dates in 2011-12. Very atypical runoff conditions occurred in 2010, with high TP discharge from wetlands. Continued monitoring is needed to determine normal watershed phosphorus yields.
Sissabagama Lake is being evaluated for possible inclusion on the 303d list. The project will determine if inclusion is appropriate.
Performance Measures: These are milestones that will be reported on in the Division Quarterly Report. Please estimate dates in a manner that encourages success. 1) Number of sample sites associated with the project. 2 2) Number of sampling events associated with project. 6 3) Estimated date when sample collection will be complete. November 1, 2011 4) Estimated date when all data will be entered into appropriate database. 12/31/2011 5) Estimated date when final report will be complete. 05/01/2012
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