USGS Water-Year Summary 2020
03086000 OHIO RIVER AT SEWICKLEY, PA
LOCATION - Lat 40°32'57", long 80°12'21" referenced to North American Datum of 1927, Allegheny County, PA, Hydrologic Unit 05030101, on left bank, 50 ft upstream from Dashields Dam, 1.0 mi downstream from Narrows Run, 1.0 mi northwest of Sewickley, and 13.3 mi downstream from confluence of Allegheny and Monongahela Rivers.
DRAINAGE AREA - 19,500 mi².
- WSP 1305: 1938-40 (adjusted monthly runoff). WSP 1435: 1934.
PERIOD OF RECORD - October 1933 to current year.
GAGE - Water-stage recorder and fixed-crest concrete dam control. Datum of gage is 680.00 ft above National Geodetic Vertical Datum of 1929 (U.S. Army Corps of Engineers bench mark). Prior to Nov 22, 1933, nonrecording gage, Nov 22, 1933 to May 4, 1981, water-stage recorder at site 1.5 mi upstream, Nov 14, 1988 to Jul 12, 1990, nonrecording gage, and Jul 13, 1990 to Jun 13, 1991, water-stage recorder at present site at datum 10.41 ft higher. Satellite telemetry at station.
COOPERATION - Station established and maintained by the U.S. Geological Survey. Funding for the operation of this station is provided by the U.S. Army Corps of Engineers, Pittsburgh District and the U.S. Geological Survey.
PERIOD OF RECORD - October 2000 to current year.
COOPERATION - Water-quality samples were collected as part of the Pennsylvania Department of Environmental Protection Water-Quality Network (WQN) in cooperation with that agency.