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.
USGS Water-Year Summary 2024
01551500 WEST BRANCH SUSQUEHANNA RIVER AT WILLIAMSPORT, PA
LOCATION - Lat 41°14'10", long 76°59'49" referenced to North American Datum of 1927, Lycoming County, PA, Hydrologic Unit 02050206, on right bank 100 ft upstream from Market Street bridge at South Williamsport, and 350 ft upstream from Hagerman's Run.
DRAINAGE AREA - 5,682 mi².
REVISIONS HISTORY - WSP 756: Drainage area. WSP 1302: 1925-28. WSP 1502: 1895-1904, 1912-13, 1919.
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1895 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 494.27 ft above North American Vertical Datum of 1988. Mar 1, 1895, to Sep 30, 1928, nonrecording gage at bridge 100 ft downstream at same datum. Prior to Jul 1980, 100 ft downstream on left bank at same datum. Prior to March 14, 2024, the datum of gage was reported as 494.98 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at station.
COOPERATION - Station established and maintained by the U.S. Geological Survey. Funding for this station provided by the Pennsylvania Department of Environmental Protection, the City of Williamsport and the U.S. Geological Survey.
REMARKS - Flow slightly regulated by 6 flood-control reservoirs which have a combined capacity of 440,200 acre-ft. Records are good except those for estimated discharge, which are poor.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage known prior to 1895, 32.4 ft, Jun 1, 1889, discharge, about 252,000 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.
