Muddy Creek (Slippery Rock Creek)
Muddy Creek is a tributary of Slippery Rock Creek in Butler and Lawrence Counties in Pennsylvania in the United States. The run is 23.2 miles (37.3 km) long, flows generally west, and its watershed is 58.2 square miles (150.7 km2) in area. Muddy Creek is the main water source for Lake Arthur in Moraine State Park.
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