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Water-Year Summary for Site 01420500

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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Available Parameters
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  

Water year 2024: 2024-10-01 to 2025-09-30
 
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USGS Water-Year Summary 2024
01420500 BEAVER KILL AT COOKS FALLS, NY
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.
REVISIONS HISTORY - WSP 521: Drainage area. WSP 781: 1933(M). WSP 891: 1936-39(M). WSP 1202: 1950. WSP 1232: 1950(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1913 to current year.
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 2014-23: 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.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 1987 to September 2009, October 2016 to current year.
REMARKS - Temperature readings prior to Oct. 1, 2007, rounded to the nearest 0.5°C.
EXTREMES FOR PERIOD OF DAILY RECORD - 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.