This program examined a sub-watershed of Lake Michigan's Grand Traverse Bay watershed to evaluate sources of non-point source pollutants to Mitchell Creek and ultimately, the Bay. The study determined baseflow and runoff mass loadings of total phosphorus, available phosphorus, nitrate nitrogen, total suspended solids and chlorides in the stream. Wetlands in the watershed were evaluated as natural sinks for non-point source pollutants. Based on the findings, an implementation plan for correcting existing problems was developed which emphasized agricultural, urban and golf course best management practices (BMPs). A proactive plan for protecting the existing high water quality of the stream in spite of future developmental pressures was also developed for implementation in the watershed.
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