Funding for this site is provided by:
42°00'08", long 76°38'05" referenced to North
American Datum of 1983, Chemung County, NY, Hydrologic Unit 02050105,
on right bank 100 ft upstream from bridge on State Highway 427, 0.7 mi
southwest of Chemung, and 10.0 mi upstream from mouth.
PERIOD OF RECORD.--
September 1903 to current year (gage heights
only for some winter periods).
WSP 891: 1935-39. WSP 1432: 1904, 1907, 1915.
WSP 2103: Drainage area. WDR NY-74-1: 1973.
Water-stage recorder. Datum of gage is 778.63 ft above
NGVD of 1929 (levels by Corps of Engineers). Prior to Jan. 10, 1930,
nonrecording gage on highway bridge 60 ft upstream at same datum.
High flows significantly regulated by upstream
reservoirs. From 1931-98, a large part of flow from 45.5 mi2
of drainage area upstream from Lamoka Lake on Mud Creek, an upstream
tributary, had been diverted into Keuka Lake (Oswego River basin) for
power development. Water Year 2014: Records good except those for
estimated daily discharges, which are fair, and those for May 17 to
Aug. 18, which are poor (due to sluggish intakes).
Water Year 2015: Records good except those for estimated daily
discharges, which are fair.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, since
construction of Tioga, Hammond and Cowanesque Lakes in 1979, 77,800
/s, Jan. 20, 1996, gage height 19.71 ft; minimum
discharge, 104 ft3
/s, Sept. 3, 1991; minimum gage height,
2.71 ft, Sept. 28-29, 2015.
EXTREMES FOR PERIOD PRIOR TO REGULATION.--
prior to construction of Tioga, Hammond and Cowanesque Lakes in 1979,
/s, June 23, 1972, gage height, 31.62 ft, from
floodmark, from rating curve extended above 65,000 ft3
basis of slope-area and velocity-area studies at gage height 19.57 ft,
and slope-area and contracted-opening measurements at gage heights
23.97 ft and 31.62 ft, respectively; minimum discharge, 49
/s, Aug. 14, 1911, gage height, 1.47 ft.
Peak Flow and Stage Information