LOCATION.--Lat 42°53'24.3", long 78°38'41.8" referenced to North American Datum of 1983, Erie County, NY, Hydrologic Unit 04120103, on right bank 150 ft upstream from low dam in Como Lake Park, 700 ft downstream from bridge on Bowen Road, 800 ft downstream from Little Buffalo Creek, 2.0 mi southeast of Lancaster, and 8.7 mi upstream from mouth.
DRAINAGE AREA.--96.4 mi².
PERIOD OF RECORD.--September 1938 to September 1968, annual maximum only--1971-74, May 1974 to current year.
REVISIONS HISTORY.--WDR NY-82-3: Drainage area. 2012 (M). Discharge for the period July 12, 2017 to Apr. 30, 2018 was revised on Feb. 7, 2019, based on changes to the stage-discharge rating.
GAGE.--Water-stage recorder and low concrete dam as control. Datum of gage is 672.02 ft above NGVD of 1929 and 671.51 ft above NAVD of 1988.
REMARKS.--Since August 1962, undetermined amount of flow diverted by Lancaster Country Club for irrigation upstream from station. Concrete dam configuration modified in September 1974 resulting in a lower point of zero flow.
Water Years 2014-16: Records good except those for estimated daily discharges, which are fair.
Water Years 2017-23: Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 13,400 ft³/s, July 13, 2017, gage height, 11.06 ft; maximum gage height, 13.35 ft, Jan. 23, 1999 (ice jam); practically no flow part of Aug. 8, 9, 1939, when stop logs were installed in the dam.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 18,000 ft³/s, sometime in June 1937, provided by the U.S. Army Corps of Engineers.

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