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During cold weather, ice effects on stage and discharge determinations
at some stream-gaging stations are likely. Data values reported on
these pages may be significantly higher or lower than actual
streamflow. Adjustment of data for ice effects can only be done after
detailed analysis. Users are encouraged to contact this office for more
information on specific stream-gaging stations.
PROVISIONAL DATA SUBJECT TO REVISION
STATION.--03041500 CONEMAUGH RIVER AT SEWARD,
PALOCATION.--Lat 40`25'09", long 79`01'35", Westmoreland County, Hydrologic Unit 05010007, on left bank at upstream side of bridge on State Highway 56 at Seward, 2.0 mi downstream from Findley Run, and 9 mi northwest of Johnstown.
DRAINAGE AREA.--715 mi2.
PERIOD OF RECORD.--May 1938 to current year.
GAGE.--Water-stage recorder. Datum of gage is 1,076.01 ft above sea level.
REMARKS.--Flow regulated by steel mills and reservoirs above station; the eight most effective reservoirs have a combined capacity of 51,850 acre-ft. U.S. Army Corps of Engineers satellite telemeter at station.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Mar. 18, 1936 reached a stage of 26.4 ft, from floodmarks, discharge, 75,000 ft3/s, by contracted-opening measurement at site 6.7 mi downstream, adjusted for inflow.
FLOOD STAGE.--NOAA, National Weather Service river forecast station flood stage provided to USGS April 1999 is 12 feet.
COOPERATION.--Funding for the operation of this station is provided by the U.S. Army Corps of Engineers, the Pennsylvania Department of Environmental Protection, and the U.S. Geological Survey.
