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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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USGS Water-Year Summary 2024
14217599 SWIFT RESERVOIR 3.2 MI EAST OF DAM NEAR COUGAR, WA
LOCATION - Lat 46°03'46", long 122°07'52" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 sec.25, T.7 N., R.5 E., Skamania County, WA, Hydrologic Unit 17080002, on right bank, 0.8 mi southeast of Marble Creek, and 8.3 mi east of Cougar.
DRAINAGE AREA - Not determined.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2017 to current year (November 2009 to September 2017 are unpublished, data available in files of Washington Water Science Center.)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 Sept. 29, 1958; dam completed in December 1958. Usable capacity, 412,500 acre-ft between elevations 878 ft, lower limit for economic operation, and 1,000 ft, maximum operating limit. Dead storage unknown. Water is used by PacifiCorp for power generation.
EXTREMES FOR PERIOD OF RECORD - (Since Water Year 2018) Maximum elevation, 999.02 ft, May 29, 2018; minimum elevation, 952 ft, Sept. 27, 2023.
