USGS Water-Year Summary 2019
01511500 TIOUGHNIOGA RIVER AT ITASKA, NY
LOCATION - Lat 42°17'53", long 75°54'32" referenced to North American Datum of 1983, Broome County, NY, Hydrologic Unit 02050102, on right bank on downstream side of bridge at Barker Hill Road at Itaska, 3.8 mi downstream from Otselic River and Village of Whitney Point, 4.4 mi downstream from spillway of Whitney Point Dam, and 6.0 mi upstream from mouth.
DRAINAGE AREA - 730 mi².
PERIOD OF RECORD - Continuous record--October 1929 to June 1967. Annual maximum only--1968 to current year. October 2017 to current year (gage heights only).
GAGE - Water-stage recorder. Datum of gage is 917.97 ft above NGVD of 1929 and 917.52 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge since current degree of regulation, 22,600 ft³/s, Feb. 26, 1961, gage height, 11.15 ft.
EXTREMES FOR PERIOD PRIOR TO REGULATION - Maximum discharge prior to current degree of regulation, 61,100 ft³/s, July 8, 1935, gage height, 16.61 ft, from floodmark.