The Greater Redstone watershed
The Greater Redstone watershed, which contains nearly 300 miles of streams, covers an area of approximately 120 square miles in north-central and northwestern Fayette County and a small portion of southwestern Westmoreland County, Pennsylvania. The area referred to as the Greater Redstone watershed is actually comprised of three smaller watersheds that drain independently to the Monongahela River. The major waterways draining these three smaller watersheds are Redstone Creek, Little Redstone Creek, and Downers Run.

Redstone Creek originates in Forbes State Forest along the western slope of Chestnut Ridge. Many of the creeks and streams in Fayette County drain into Redstone Creek as it flows toward the northwest passing through Uniontown, Phillips, Waltersburg, Smock, and Grindstone before its confluence with the Monongahela River north of Brownsville.

Parts of Wharton Township, Georges Township, South Union Township, North Union Township, Menallen Township, Dunbar Township,

Place your cursor on the map to see the three watersheds that make up the Greater Redstone watershed.
Franklin Township, Redstone Township, Brownsville Township, Perry Township, Jefferson Township, and the City of Uniontown all drain to Redstone Creek along its 28 mile course.

The major named tributaries to Redstone Creek include Lick Run, Bennington Spring Run, Coal Lick Run, Coolspring Run, Shutes Run, Cove Run, Jennings Run, Fans Run, Rankin Run, Bute Run, Craig Branch, Keister Hollow, Bolden Run, Rowes Run, Allen Run, Shear Hollow, Colvin Run, Crabapple Run, and Washwater Run. A few unnamed tributaries also feed Redstone Creek.
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Little Redstone Creek begins in the eastern part of Jefferson Township and flows for approximately 5 miles toward the northwest before entering the Monongahela River northwest of Gillespie.

Little Redstone Creek and its tributaries drain the northern part of Jefferson Township as well as areas in Perry Township and Washington Township.  Little Redstone creek does not have any named tributaries.

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Downers Run flows toward the southwest, covering approximately 2 miles along its main stem, with its tributaries draining the northernmost portion of Washington Township, Fayette City borough, and a small portion of Rostraver Township in Westmoreland County.

Downers Run meets the Monongahela River just west of Fayette City. Lutz Run and Mill Run are the only named tributaries of Downers Run.

A few small lakes, ponds, and reservoirs exist throughout the Greater Redstone watershed, including the three Hutchinson Reservoirs, Spillway Lake, and Franklin Lake.
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