Peltier Lake and Centerville Lake TMDL Implementation Plan

Peltier Lake and Centerville Lake were both listed as impaired waters by the MPCA in the 2002 303d list. The impaired use is aquatic recreation, with the stressor identified as "nutrient/ eutrophication biological indicators." The Centerville Lake watershed lies entirely within the Peltier Lake watershed. A TMDL report was completed jointly for both lakes. The TMDLs for Peltier Lake and Centerville Lake were established based on the state eutrophication standards for both lakes (Table 2). At the outset of this project an alternative water quality endpoint was proposed for Peltier Lake—80 μg/L TP. This endpoint was a natural background condition and was based on paleolimnological diatom reconstructions done by the Science Museum of Minnesota for Peltier Lake (Appendix B of the TMDL). At this time, however, a formal natural background condition is not being proposed for Peltier Lake. Thus, only the current state eutrophication standards will apply. However, information and results relating to the previously sought natural background condition will remain in the TMDL document and this implementation plan solely for reference and for possible reconsideration of an alternative endpoint in the future.