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The 15-minute precipitation data for this station are temporary and will only be displayed for 120 days. Although the instrumentation is calibrated at least once/year, the temporary classification means that documented routine inspections and other quality assurance measures are not performed that would make the data acceptable for archival, retrieval, or future use in general scientific or interpretive studies.

This station is operated in cooperation with:
   NYS Department of Environmental Conservation
   U.S. Geological Survey

LOCATION.--Lat 42°27'48", long 78°56'03" referenced to North American Datum of 1983, Erie County, NY, Hydrologic Unit 04120102, on right bank 15 ft upstream from bridge on State Highways 39 and 62 at Gowanda, 4.2 mi downstream from South Branch, and 17.8 mi upstream from mouth.
DRAINAGE AREA.--436 mi2.
PERIOD OF RECORD.--November 1939 to March 1998, October 1999 to current year.
REVISED RECORDS.--WSP 2112: Datum. WDR NY-71-1: 1956 (M). WDR NY-74-1: 1940-42 (M). WDR NY-82-3: Drainage area. WDR NY-09-3: 1990-98, 2000-08 (P).
GAGE.--Water-stage recorder. Datum of gage is 738.85 ft above NGVD of 1929. Prior to Oct. 1, 1969, at datum 0.11 ft lower. Prior to May 29, 2011, at location 470 ft downstream at same datum.
REMARKS.--Records good except those for estimated daily discharges, which are fair. Diurnal fluctuation at low and medium flow caused by powerplant 20 mi upstream from station. Telephone and satellite gage-height telemeters at station.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 34,600 ft3/s, Mar. 7, 1956, gage height, 14.03 ft; minimum discharge, about 6 ft3/s, Aug. 21, 1941, result of regulation; minimum gage height, 0.90 ft, Oct. 26, 1951.
INSTRUMENTATION1.--ISCO refrigerated automatic sampler since June 2011. A YSI 6920-V2 continuous monitor with water temperature, specific conductance, pH, dissolved oxygen and turbidity since June 2011 provides 15-minute-interval readings.
EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: Maximum, 33.0°C, July 22, 2011; minimum, -0.1°C, on several days.
SPECIFIC CONDUCTANCE: Maximum, 590 µS/cm @ 25°C, Sept. 20, 21, 2011; minimum, 122 µS/cm @ 25°C, Oct. 28, 29 2011. pH: Maximum, 8.9, Apr. 29, 30, May 1, 2013; minimum, 7.7, Jan 29, 2013. DISSOLVED OXYGEN: Maximum, 14.7 mg/L, Jan. 8, 9, 2013; minimum, 6.7 mg/L, July 17, 2012. TURBIDITY: Maximum, >1,380 FNU, May 29, 2013; minimum, 3.0 FNU, Aug. 21, 22, 2013.[>, actual value is known to be greater than the value shown].
1 Water-Quality Records
Derived from NY Annual Water-Data Report 2013

Peak Flow and Stage Information
This station managed by the NY Water Science Center, Ithaca.

Available Parameters Available Period
All 8 Available Parameters for this site
00010 Temperature, water 2011-06-02  2015-11-25
00095 Specific cond at 25C 2011-06-03  2015-11-25
00065 Gage height 2015-07-28  2015-11-25
00060 Discharge 2007-10-01  2015-11-25
00400 pH 2011-06-03  2015-11-25
63680 Turbidity, Form Neph 2011-06-03  2015-11-25
00300 Dissolved oxygen 2011-06-03  2015-11-25
00045 Precipitation 2015-07-28  2015-11-25

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Summary of all available data for this site
Instantaneous-data availability statement

Gage height, feet

Most recent instantaneous value: 1.94   11-25-2015  16:15 EST
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Discharge, cubic feet per second

Most recent instantaneous value: 357   11-25-2015  16:15 EST
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Daily discharge, cubic feet per second -- statistics for Nov 25 based on 74 years of record more
Most Recent
Value Nov 25
Median Mean 75th
104 357 365 586 809 872 5720