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Thunder Bay River, Main Branch Watershed

Watershed SummaryThunder Bay River, Main Branch Watershed 

The 1,200 square mile Thunder Bay River watershed is 68% forested, 11% agriculture, 8% wetlands and open water, 10% urban built-up and 3% non-forest.  The Thunder Bay River Watershed Plan was approved under the CMI administrative rules and was funded under section 319.  Major pollutants include: 1) sediments from stream banks, road stream crossings and construction; 2) nutrients from agriculture, lawn care practices and septic systems, and 3) toxic pollution from storm water runoff. 

MDEQ Nonpoint Source Links 

Watershed Websites 

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