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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
01552000 LOYALSOCK CREEK AT LOYALSOCKVILLE, PA
LOCATION - Lat 41°19'30", long 76°54'46" referenced to North American Datum of 1927, Lycoming County, PA, Hydrologic Unit 02050206, on right bank 30 ft downstream from bridge on State Highway 973 at Loyalsockville, 2.5 mi downstream from Wallis Run, and 7.3 mi upstream from mouth.
DRAINAGE AREA - 435 mi².
REVISIONS HISTORY - WSP 871: 1938(M). WSP 1051: 1926(M), 1933(M), 1936(M). WSP 1302: 1926-30. WSP 1502: 1932-33, 1935(M), 1937(M). WDR PA-99-2: Drainage area, 1972(M). WDR PA-02-2: 1926-95(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - August 1925 to September 1974, October 1975 to current year. Prior to October 1925, monthly discharge only, published in WSP 1302. Prior to October 1969, published as "at Loyalsock".
GAGE - Water-stage recorder, crest-stage gage, and weighing bucket precipitation gage. Datum of gage is 585.61 ft above North American Vertical Datum of 1988 (from benchmark). Aug 1925 to Sep 16, 1926, non-recording gage, and Sep 17, 1926, to Jun 13, 1988, water-stage recorder at site 500 feet downstream on left bank at same datum. Prior to August 30, 2024, the datum of gage was reported as 586.33 ft above NGVD of 1929. Satellite telemetry at station.
COOPERATION - Station established and maintained by the U.S. Geological Survey in cooperation with the Pennsylvania Department of Environmental Protection.
REMARKS - Highest daily mean flow for period of record is an estimated value. Records are good except those for estimated discharges, which are poor.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Sep 26, 1975, reached a stage of 14.50 ft, from floodmark, discharge, 46,000 ft³/s.
WATER-QUALITY RECORDS
PERIOD OF RECORD - April 2002 to current year.
COOPERATION - Water-quality samples were collected as part of the Pennsylvania Department of Environmental Protection Water-Quality Network (WQN) with cooperation from the Pennsylvania Department of Environmental Protection.
REMARKS - As of October 2013, results from discrete water quality samples collected at this site are available through the U.S. Geological Survey National Water Information System web interface on the "Water Quality for the Nation" webpage. Analyses for pH, water temperature, specific conductance, and dissolved oxygen were performed on site. All other sample analyses were performed at the Pennsylvania Department of Environmental Protection laboratory in Harrisburg, Pa. Occasionally, values for filtered parameters may exceed values for the corresponding unfiltered parameter. These results are within the limits of analytical precision and methods.
