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STATION.--03085000 MONONGAHELA RIVER AT BRADDOCK, PA
LOCATION.--Lat 40`23'28", long 79`51'30", Allegheny County, Hydrologic Unit 05020005, near right bank on river guide wall 300 ft upstream from dam at lock 2 at Braddock, 1,700 ft downstream from Turtle Creek, and 11.2 mi upstream from confluence with Allegheny River. Water quality sonde located on the left bank, left river guide wall of lock and dam at Lat 40 23' 21.77", Long 79 51' 30.62".
DRAINAGE AREA.--7,337 square miles.
PERIOD OF RECORD.--October 1938 to current year. Monthly discharge only for some periods, published in WSP 1305.
GAGE.--Water-stage recorder and fixed-crest concrete dam control with streamward lock chamber usable as floodway during high flow since 1951. Datum of gage is Datum of gage is 709.15 ft above North American Vertical Datum of 1988 (from benchmark). Prior to Aug. 13, 1951, at site 700 ft upstream, and Aug. 13, 1951 to Nov. 8, 1990 at present site at datum 2.50 ft lower. Prior to February 20, 2024, the datum of gage was reported as 709.66 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at site.
COOPERATION.--Funding for the operation of this station is provided by the U.S. Army Corps of Engineers, Pittsburgh District and Sustainable Hydro, Braddock, LLC.
REMARKS.--Flow regulated by locks and hydroelectric plants, since 1938 by Tygart Lake, since 1926 by Lake Lynn, since 1925 by Deep Creek Reservoir, and since 1943 by Youghiogheny River Lake, combined capacity, 704,300 acre-ft. U.S. Army Corps of Engineers satellite telemeter at station.
GAGE HEIGHTS OF IMPORTANCE.-
Supplied by NWS: Action stage 18.2 ft; Flood stage-22 ft; Moderate flood stage-23 ft; Major flood stage-24 ft.