LOCATION.--Lat 42°40'56.9", long
77°49'43.3" referenced to North American Datum of
1983, Livingston County, NY, Hydrologic Unit 04130002, on left
bank 290 feet upstream from bridge on State Highway 36, at
Sonyea.
DRAINAGE AREA.--68.3 mi².
PERIOD OF RECORD.--March 1911 to December 1913
(published as "at Sonyea"), September 1915 to
December 1916 (published as "near Sonyea") seasonal
records only. August 1917 to September 1932, November
1974 to September 1977, April 2016 to current year.
Occasional discharge measurements, water years, 1954,
1957-62,1964, and 1965.
REVISIONS HISTORY.--WDR NY-75-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is
581.76 ft above NAVD of 1988. Prior to April 2016,
water-stage recorder at site 400 ft upstream at different
datum. Prior to Sept. 30, 1932, nonrecording gages at
different sites and datum.
COOPERATION.--In cooperation with the U.S. Environmental
Protection Agency's Great Lakes Restoration Initiative
(GLRI) and New York State Department of Corrections and
Community Supervision.
REMARKS.--Water Years 2016-21: Records fair except those
for estimated daily discharges and those above 1,200 ft³/s,
which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 6,280
ft³/s Sept. 25, 1977, gage height 6.69 ft, from rating curve
extended above 600 ft³/s, site and datum then in use; minimum
discharge, about 0.1 ft³/s Sept. 8-21, 1932, at site then in
use.
PERIOD OF DAILY RECORD1.--WATER TEMPERATURE:
April 2016 to March 2019. SPECIFIC CONDUCTANCE: April 2016 to
March 2019. pH: April 2016 to March 2019. DISSOLVED OXYGEN:
April 2016 to March 2019. TURBIDITY: April 2016 to March
2019.
INSTRUMENTATION1.--Multi-parameter
water-quality sonde measures water temperature, specific
conductance, pH, dissolved oxygen, and turbidity at 15-minute
intervals from April 2016 to March 2019.
EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER
TEMPERATURE: Maximum, 30.4°C, July 4, 2018; minimum,
-0.1°C, Mar. 2, 4, 5, 17, 18, 2018, and many days in 2019.
SPECIFIC CONDUCTANCE: Maximum, 604 uS/cm @ 25°C, Nov. 23, 2016;
minimum, 168 uS/cm @ 25°C, Apr. 20, 2017. pH: Maximum, 8.9,
Mar. 24, 26, 2018; minimum, 7.6, June 15, 16, 2017. DISSOLVED
OXYGEN: Maximum, 15.3 mg/L, Mar. 13, 2017, Mar. 25, 2018;
minimum, 6.2 mg/L, Aug. 5, 6, 13, 2016. TURBIDITY: Maximum,
3770 FNU, June 15, 2017; minimum, 0.0 FNU, on many days in
2018.
1 Water-Quality Records
We're replacing this page with a Next Generation Monitoring Location Page.
Site Information
WaterNow – get the latest
gage data from your mobile phone or email.
Station image
