USGS Water-Year Summary for Site 03031500

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	00060 Discharge(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

03031500 ALLEGHENY RIVER AT PARKER, PA

LOCATION - Lat 41°06'02", long 79°40'53" referenced to North American Datum of 1927, Armstrong County, PA, Hydrologic Unit 05010006, on right bank 500 ft downstream from bridge on State Highway 368 at Parker, 1.1 mi downstream from Clarion River, at river mile 83.4.

DRAINAGE AREA - 7,671 mi².

REVISIONS HISTORY -

Revisions: The discharge on November 2, 2018 - February 22, 2019 was revised on Jun 20, 2019 due to changes in the stage-discharge relation based upon additional measurements performed after the data was approved

Prior to April 5, 2023, the datum of gage was erroneously reported as 845.14 ft above National Geodetic Vertical Datum of 1929.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1932 to current year. Prior to October 1963, published as "at Parkers Landing." Gage height records collected at same site since 1885 are contained in reports of U.S. Weather Bureau.

GAGE - Water-stage recorder. Datum of gage is 844.77 ft above North American Vertical Datum of 1988. Prior to Oct 1, 1932, U.S. Weather Bureau gages at different datums. Oct 1-28, 1932, non-recording gage at datum 27.00 ft lower. Prior to April 5, 2023, the datum of gage was erroneously reported as 845.14 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 operation of this station is provided by the U.S. Army Corps of Engineers, Pittsburgh District, the Pennsylvania Department of Environmental Protection, and the U.S. Geological Survey.

REMARKS - Flow regulated since 1924 by Piney Reservoir, since December 1940 by Tionesta Reservoir (station 03019500), since November 1949 by Chautauqua Lake, since June 1952 by East Branch Clarion River Lake (station 03027000), since October 1965 by Allegheny Reservoir (station 03012520), since July 1970 by Union City Reservoir (station 03021518), and since January 1974 by Woodcock Creek Lake (station 03022550). Records are good except those for estimated discharge, which are poor.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Mar 17, 1865 reached a stage of 29.4 ft, present datum, discharge, about 250,000 ft³/s, from rating curve extended above 137,000 ft³/s.