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Water-Year Summary for Site 14218480

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
62614 Elevation, lake/res, NGVD29(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
14218480 YALE RESERVOIR NEAR COUGAR, WA
LOCATION - Lat 46°01'58", long 122°18'42" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.04, T.6 N., R.4 E., Cowlitz County, WA, Hydrologic Unit 17080002, on east shore, mid-reservoir, 1 mi SW of Cougar, WA.
DRAINAGE AREA - 596 sq. mi.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2017 to current year. (February 2010 to September 2017 are unpublished, data available in files of Washington Water Science Center.)
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929.
COOPERATION - Gage is on the property of and in cooperation with Pacificorp.
REMARKS - Reservoir is formed by rock and earthfill dam; storage began July 31, 1952; dam completed in 1952. Usable capacity, 185,000 acre-ft between elevations 430 ft, lower limit for economic operation, and 490 ft, top of spillway gates. Dead storage below elevation 417 ft, 168,800 acre-ft. Water is used by PacifiCorp for power generation.
EXTREMES FOR PERIOD OF RECORD - (Since Water Year 2018) Maximum elevation, 489.95 ft, Apr. 20, 2019; minimum elevation, 461.00 ft, Dec. 27, 2019