Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

Click to hideNews Bulletins

Water-Year Summary for Site 01517900

Click to hide Water-Year Summary instructions and information
  • 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.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00062 Elevation, reservoir(Max.,Min.,Mean)  

Water year 2020: 2019-10-01 to 2020-09-30

Print this page
USGS Water-Year Summary 2020
LOCATION - Lat 41°53'57", long 77°08'21" referenced to North American Datum of 1927, Tioga County, PA, Hydrologic Unit 02050104, at Tioga Dam on Tioga River, 0.8 mi south of Tioga, and 1.7 mi upstream from Crooked Creek.
DRAINAGE AREA - 280 mi².
PERIOD OF RECORD - November 1979 to September 2013 (elevation and contents), October 2013 to current year (elevation).
GAGE - Water-stage recorder. Datum of gage is U.S. Army Corps of Engineers local project datum. Prior to water year 2007, the datum was incorrectly reported as NGVD 1929. Satellite and landline telemetry at station.
COOPERATION - Content tables provided by U.S. Army Corps of Engineers. Station established and maintained by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers, Baltimore District.
REMARKS - Reservoir is formed by rolled earth and rockfill dam. Flow is regulated by two service gates and two low flow water-quality gates. Tioga Lake is connected to Hammond Lake by a connecting channel that contains two gates and an overflow weir at elevation 1,101.00 ft. It is possible for flow to go in either direction depending on the head difference in the two lakes. Storage began in November 1979. Capacity at elevation 1,131.00 ft is 62,300 acre-ft. Recreation lake elevation is 1,081.0 ft, capacity 9,945 acre-ft. Reservoir is used for flood control, recreation, and water quality. Figures given herein represent total contents.

Extreme elevations: Maximum elevation, 1,123.21 ft, Apr 3, 1993; minimum, 1,060.05 ft, Oct 25, 1980.

Extreme contents prior to water year 2014: Maximum contents, 50,090 acre-ft, Apr 3, 1993, elevation, 1,123.21 ft; minimum, 2,210 acre-ft, Oct 25, 1980, elevation, 1,060.05 ft.