USGS Water-Year Summary 2021
01574700 INDIAN ROCK DAM NEAR YORK, PA
LOCATION - Lat 39°55'22", long 76°45'14" referenced to North American Datum of 1927, York County, PA, Hydrologic Unit 02050306, at dam on Codorus Creek, 0.1 mi upstream from mouth of South Branch Codorus Creek, 0.3 mi west of York Water Co. pumping station, and 3.0 mi southwest of York.
DRAINAGE AREA - 93.7 mi².
PERIOD OF RECORD - September 1962 to September 2016 (elevation and contents) and October 2016 to current year (elevation) in reports of Geological Survey, September 1942 to August 1962 in files of Baltimore District, U.S. Army Corps of Engineers.
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 - Funding for the operation of this station is provided by the U.S. Army Corps of Engineers, Baltimore District.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 30,200 acre-ft, Jun 23, 1972, elevation, 436.44 ft; minimum, no storage many days most years.