Funding for this site is provided by:
42°36'10", long 76°09'34" referenced to North
American Datum of 1983, Cortland County, NY, Hydrologic Unit 02050102,
on right bank at east end of Elm Street at Cortland, 0.4 mi downstream
from confluence of East and West Branches.
292 mi². including 14.0 mi², the flow from which
may be diverted into DeRuyter Reservoir in Oswego River basin.
PERIOD OF RECORD.--
May 1938 to current year.
WSP 2103: Drainage area. WDR NY-74-1:
Water-stage recorder. Datum of gage is 1,084.92 ft above
NGVD of 1929 and 1,084.46 ft above NAVD of 1988. Prior to Oct. 1, 1939,
at datum 4.00 ft higher. Oct. 1, 1939 to Sept. 30, 1963, at datum 3.00
Diurnal fluctuation at low and medium flow caused by
operation of mills on West Branch. Slight diversion from East Branch
for operation of Erie (Barge) Canal. Slight diversion from Gate House
Pond on West Branch 17 mi upstream from station into Onondaga Creek
basin (St. Lawrence River basin).
Water Years 2014-17: Records good except those for estimated daily
discharges, which are fair. Water Years 2018-19: Records good except
those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 14,200 ft³/s,
Apr. 3, 2005, gage height, 14.07 ft; minimum discharge, 9.8 ft³/s,
Sept. 20, 1939, Sept. 29, 1959.
Peak Flow and Stage Information