Stillwater River (Ohio)

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Stillwater River
Stillwater River.JPG
Stillwater River flows under Interstate 70 near Dayton, Ohio
Origin Near Union City, Ohio
Mouth Great Miami River in Dayton
Length 69 miles (111 km)
Source elevation ~ 1,050 ft (320 m) [1]
Mouth elevation ~ 750 ft (229 m) [2]
Basin area 682 mi² (1,766 km²) [3]

The Stillwater River is a 69.3-mile-long (111.5 km)[4] tributary of the Great Miami River in western Ohio in the United States. Via the Great Miami and Ohio rivers, it is part of the Mississippi River watershed.

It rises near the Indiana state line, in western Darke County, approximately 10 miles (16 km) northwest of Greenville. It flows east-southeast and is joined by Greenville Creek in Covington, approximately 5 miles (8 km) west of Piqua. It flows south past Covington and Englewood, where it is dammed for flood control, then southeast to join the Great Miami River in Dayton.

The Stillwater River was one of the Great Miami River tributaries that flooded during the Great Dayton Flood of 1913, resulting in the creation of the Miami Conservancy District.

Variant names[edit]

According to the Geographic Names Information System, the Stillwater River has also been known as:[5]

  • Jacobs Lateral
  • Southwest Branch
  • Stillwater Creek

See also[edit]


  1. ^ U.S. Geological Survey. Ansonia quadrangle, Ohio. 1:24,000. 7.5 Minute Series. Washington D.C.: USGS, 1988.
  2. ^ U.S. Geological Survey. Dayton North quadrangle, Ohio. 1:24,000. 7.5 Minute Series. Washington D.C.: USGS, 1996.
  3. ^ "Map of Ohio watersheds". 
  4. ^ U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map, accessed May 19, 2011
  5. ^ U.S. Geological Survey Geographic Names Information System: Stillwater River

Coordinates: 39°46′42″N 84°12′02″W / 39.77839°N 84.20050°W / 39.77839; -84.20050