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USGS Water-Year Summary 2024
03048500 KISKIMINETAS RIVER AT VANDERGRIFT, PA
LOCATION - Lat 40°36'16", long 79°33'08" referenced to North American Datum of 1927, Westmoreland County, PA, Hydrologic Unit 05010008, on left bank, 0.5 mi upstream from bridge on State Highway Alternate 66 at Vandergrift, and 2.2 mi upstream from Pine Run.
DRAINAGE AREA - 1,825 mi².
REVISIONS HISTORY - Revisions: Prior to January 2, 2024, the datum of gage was erroneously reported as 769.40 ft above National Geodetic Vertical Datum of 1929.
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1937 to current year. Monthly discharge only for some periods, published in WSP 1305. October 1920 to September 1932 (gage heights and discharge measurements only) in reports of Pennsylvania Department of Forests and Waters.
GAGE - Water-stage recorder. Datum of gage is 769.1 ft above North American Vertical Datum of 1988. Oct 1, 1920 to Sep 30, 1930, non-recording gage, Oct 1, 1930 to Sep 30, 1932, water-stage recorder, at site 0.6 mi downstream at different datum. Prior to January 2, 2024, the datum of gage was erroneously reported as 769.40 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, the Pennsylvania Department of Environmental Protection, and the U.S. Geological Survey.
REMARKS - Flow regulated since June 1942 by Loyalhanna Lake (station 03046500), 20 mi upstream, since November 1951 by Conemaugh Lake (station 03043500), 23 mi upstream, since July 1971 by Yellow Creek Lake (station 03042260), and by other reservoirs upstream of station; the 11 most effective of which have a combined capacity of 105,700 acre-ft. Figures of daily discharge do not include diversion from Beaver Run Reservoir to plants and communities downstream, or into the Monongahela River Basin. Evaporation from operation of Homer City and Conemaugh generating stations, which began during 1969 and 1970, respectively, can amount to as much as 45 ft³/s. Record is considered good except those for estimated daily discharge, which is poor.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Mar 18, 1936 reached a stage of 41.64 ft, from floodmark at present site, discharge, about 185,000 ft³/s.
