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Water-Year Summary for Site 12026400

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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
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
12026400 SKOOKUMCHUCK RIVER NEAR BUCODA, WA
LOCATION - Lat 46°46'20", long 122°55'23" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.22, T.15 N., R.2 W., Thurston County, WA, Hydrologic Unit 17100103, on left bank 100 ft downstream from bridge on State Highway 507, 3.3 miles southwest of Bucoda, and at mile 6.4.
DRAINAGE AREA - 112 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 1967 to current year.
GAGE -

Water-stage recorder. Datum of gage is NAVD of 1988 (USGS GNSS Level II survey). Prior to May 3, 2018 datum of gage was 198.19 ft above NAVD88, since Water Year 1993. Prior to Oct. 1, 1992, at datum 0.41 ft higher.

REMARKS - Flow regulated by Skookumchuck Dam since January 1971. An average of 30 ft³/s is diverted at point 0.5 mi upstream for consumptive use at Centralia Steam Electric Project. During peak demand months, up to 54 ft³/s may be diverted for periods of one day or less. Other minor diversions for domestic use and irrigation upstream from station. Water temperatures, October 1968 to September 1971. Sediment records, July 1968 to September 1971. U.S. Geological Survey satellite telemeter at station. 
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 11,300 ft³/s, Feb. 8, 1996, gage height, 17.87 ft, present datum, estimated based on comparison with upstream gaging stations; minimum discharge, 21 ft³/s, Aug. 15, 16, 18-20, 1970, gage height, 3.85 ft, minimum daily discharge 21 ft³/s, several days during Aug. 2015.