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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.

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> Site Information
LOCATION.--Lat 42°04'23.0", long 78°27'04.0" referenced to North American Datum of 1983, Cattaraugus County, NY, Hydrologic Unit 05010001, on right bank in sewage treatment facility pump house, 1.6 mi downstream from Olean Creek, in Olean.
DRAINAGE AREA.--1,192 mi².
PERIOD OF RECORD.--Occasional miscellaneous discharge measurements, water years 1967-69, 1971, 1997-98. August 2010 to current year.
GAGE.--Water-stage recorder. Datum of gage is 1,399.50 ft above NAVD of 1988. Prior to Oct. 1, 2018, at datum 2.00 ft higher.
REMARKS.--Water Year 2014: Records good except those for estimated daily discharges, which are fair.
Water Year 2015: Records fair except those for estimated daily discharges, which are poor.
Water Years 2016-22: Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 27,300 ft³/s, Dec. 2, 2010, gage height, 17.74 ft, present datum; minimum discharge, 70 ft³/s, Sept. 28, 29, 2020, gage height, 0.72 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, 59,000 ft³/s, June 23, 1972, provided by the U.S. Army Corps of Engineers.
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> Rating Information
This station managed by the NY Water Science Center Ithaca.

Available Parameters Available Period
2022-11-27  2023-03-27
2010-08-21  2023-03-27
2010-08-21  2023-03-27


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

Precipitation, total, inches

Most recent instantaneous value: 0.00 03-27-2023   10:30 EST
Graph of  Precipitation, total, inches

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