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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
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.
REVISIONS HISTORY - WSP 1305: 1938-40 (adjusted monthly runoff). WSP 1435: 1934.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1933 to current year.
GAGE - Water-stage recorder and fixed-crest concrete dam control. Datum of gage is 679.57 ft above North American Vertical Datum of 1988 (from benchmark). 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. Prior to February 21, 2024, the datum of gage was reported as 680.00 ft above National Geodetic Vertical Datum of 1929. 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.
REMARKS - Regulation by many dams above station. Records good except those for estimated daily discharge, which are poor.
WATER-QUALITY RECORDS
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.
REMARKS - As of October 2013, results from discrete water quality samples collected at this site are available through the U.S. Geological Survey National Water Information System web interface on the "Water Quality for the Nation" webpage.
Analyses for pH, water temperature, specific conductance, and dissolved oxygen were performed on site. Sample analyses were performed at the Pennsylvania Department of Environmental Protection laboratory in Harrisburg, Pa. Occasionally, values for filtered parameters may exceed values for the corresponding unfiltered parameter. These results are within the limits of analytical precision and methods.
