LOCATION.--Lat 42°19'50.9", long 79°35'23.7" referenced to North American Datum of 1983, Chautauqua County, NY, Hydrologic Unit 04120101, on left downstream wingwall of bridge on Hawley Road, 1,400 ft upstream of Interstate Highway 90, and 1.3 mi from mouth on Lake Erie.
DRAINAGE AREA.--35 mi².  
PERIOD OF RECORD.--August 2017 to current year.
REVISIONS HISTORY.--Discharge for the period Nov. 5, 2017, was revised on Feb. 21, 2024, based on changes to estimated values.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 613.62 ft above NAVD of 1988.
REMARKS.--Water Years 2017-22: Records fair except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 6,760 ft³/s, Nov. 5, 2017, gage height, 5.74 ft; minimum discharge, 2.1 ft³/s, Aug. 24, 2020, gage height, -0.09 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 7,730 ft³/s, June 23, 1972, by computation of contracted-opening measurement at site 1 mi downstream (drainage area, 35.6 mi²).

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