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USGS 01420500 BEAVER KILL AT COOKS FALLS NY

PROVISIONAL DATA SUBJECT TO REVISION

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> Site Information
    LOCATION.--Lat 41°56'47.1", long 74°58'46.8" referenced to North American Datum of 1983, Delaware County, NY, Hydrologic Unit 02040102, on left bank 125 ft downstream from bridge on Cooks Brook Road in Cooks Falls, and 5.5 mi downstream from Willowemoc Creek.
    DRAINAGE AREA.--241 mi².
    PERIOD OF RECORD.--July 1913 to current year.
    REVISIONS HISTORY.--WSP 521: Drainage area. WSP 781: 1933(M). WSP 891: 1936-39(M). WSP 1202: 1950. WSP 1232: 1950(M).
    GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 1,154.53 ft above NGVD of 1929 (corrected) and 1,153.66 ft above NAVD of 1988. Prior to Oct. 1, 1933, nonrecording gage at site 125 ft upstream at same datum.
    REMARKS.--Water Years 2014-24: Records good except those for estimated daily discharges, which are fair.
    EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 62,400 ft³/s, June 28, 2006, gage height, 20.55 ft, from floodmark in gage house, from rating curve extended above 16,000 ft³/s on basis of slope-area measurement at gage height 15.52 ft; minimum discharge, 16 ft³/s, Nov. 22, 23, 1964.
    PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: October 1987 to September 2009, October 2016 to current year.
    REMARKS1.--Temperature readings prior to Oct. 1, 2007, rounded to the nearest 0.5°C.
    EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: Prior to Oct. 1, 2007--Maximum (water years 1991, 1993-97, 1999-2007), 31.5°C, Aug. 12, 2005; minimum, 0.0°C on many days during winter periods. WATER TEMPERATURE: After Oct. 1, 2007--Maximum, 28.6°C, July 16, 2018, July 23, 2022; minimum, -0.2°C on several days during 2008 winter period.
    1 Water-Quality Records
> Rating Information
> Additional Site Information
This station managed by the NY Water Science Center Milford.

Available Parameters Available Period
  
2007-10-01  2026-08-02
1987-04-01  2026-08-02
2007-10-01  2026-08-02







 (7)
 
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Summary of all available data for this site
Instantaneous-data availability statement

Temperature, water, degrees Celsius
Most recent instantaneous value: 18.6 08-02-2026   20:00 EST
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Discharge, cubic feet per second
Most recent instantaneous value: 714 08-02-2026   19:45 EST
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Daily discharge, cubic feet per second -- statistics for Aug 2 based on 113 water years of record more
Min
(1936)		 25th
percen-
tile		 Median Mean 75th
percen-
tile		 Most Recent
Instantaneous
Value Aug 2		 Max
(2009)
38.0 85 139 256 304 714 2330

Gage height, feet
Most recent instantaneous value: 3.13 08-02-2026   19:45 EST
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