C.J. Brown Dam & Reservoir, OH is located on the northeast corner of Springfield on the Buck Creek, 7 miles above its confluence with Mad River. The project is home to two rare fen communities. Prairie Road Fen is the largest and finest prairie fen in Ohio. These rare alkaline wetlands are home to specialized plants & animals that thrive in harsh conditions including the insectivorous sundew, rare spotted turtle, and massasauga rattlesnake. The Clark County Historical Society operates the historic Crabill Homestead, bringing pioneer days back to life.

Located outside Springfield city limits, just off OH 4.