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- 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.
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USGS Water-Year Summary 2024
01500500 SUSQUEHANNA RIVER AT UNADILLA, NY
LOCATION - Lat 42°19'17.4", long 75°18'59.0" referenced to North American Datum of 1983, Otsego County, NY, Hydrologic Unit 02050101, on right bank 25 ft downstream from Bridge Street at Unadilla, 1.0 mi upstream from Carrs Creek, and 1.6 mi downstream from Ouleout Creek.
DRAINAGE AREA - 982 mi².
REVISIONS HISTORY - WSP 851: 1938 (M). WSP 2103: 1966 (M), Drainage area. Datum of gage was revised on Sept. 1, 2022, from 997.25 ft to 995.91 ft above NGVD of 1929 and from 996.85 ft to 995.71 ft above NAVD of 1988 due to computation error.
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 1938 to March 1995. 1996 to 2014 (annual maximum only). October 2014 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 995.91 ft above NGVD of 1929 and 995.71 ft above NAVD of 1988.
REMARKS - Minor regulation by upstream lakes and, since November 1949, flood flows regulated by East Sidney Lake (see station 01499500).
Water Years 2014-15: Records good except those for estimated daily discharges, which are fair.
Water Years 2016-23: Records good except those for estimated daily discharges, which are poor.
Water Years 2014-15: Records good except those for estimated daily discharges, which are fair.
Water Years 2016-23: Records good except those for estimated daily discharges, which are poor.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of March 18, 1936, reached a stage of 16.6 ft, from flood marks, discharge, 31,300 ft³/s, from publications of the Corps of Engineers, Baltimore District.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 35,100 ft³/s, June 29, 2006, gage height, 17.72 ft; minimum discharge, 39 ft³/s, Oct. 17, 1964, gage height, 1.38 ft.
