USGS Water-Year Summary 2021
03019500 TIONESTA CREEK RESERVOIR AT TIONESTA CREEK DAM, PA
LOCATION - Lat 41°28'25", long 79°26'20" referenced to North American Datum of 1927, Forest County, PA, Hydrologic Unit 05010003, in Allegheny National Forest, at control tower, 0.8 mi upstream from Tionesta Creek, 1.8 mi upstream from mouth, and 2.0 mi southeast of Tionesta.
DRAINAGE AREA - 478 mi².
PERIOD OF RECORD - December 1940 to current year.
GAGE - Water-stage recorder. Datum of gage referenced to North American Vertical Datum of 1988 (NAVD88), US Army Corps of Engineers benchmark. Prior to October 2009, datum of gage was referenced to National Geodetic Vertical Datum of 1929 (NGVD29). Satellite telemetry at station.
Conversion from NGVD29 to NAVD88 at this location is: NGVD29 elevation - 0.43ft = NAVD88 elevation.
COOPERATION - Station established and maintained by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers, Pittsburgh District.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 111,320 acre-ft, Mar. 11, 1964, elevation, 1,161.12 ft; minimum (after first filling), 3,280 acre-ft, May 12, 1971, elevation, 1,073.59 ft, (from U.S. Army Corps of Engineers records).