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USGS Water-Year Summary 2024
12089500 NISQUALLY RIVER AT MCKENNA, WA
LOCATION - Lat 46°56'01", long 122°33'35" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 sec.28, T.17 N., R.2 E., Thurston County, WA, Hydrologic Unit 17110015, on left bank at downstream side of State Highway 507 bridge at McKenna, and at river mile 21.8.
DRAINAGE AREA - 517 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1947 to September 1968, May 1977 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 285.47 ft above NGVD of 1929. Oct. 1, 1947, to Sept. 30, 1968, water-stage recorder at site 80 ft downstream at present datum, and Oct. 1, 1968, to Oct. 11, 1985, water-stage recorder at site 20 ft upstream at present datum.
REMARKS - Flow regulated by Alder Reservoir (station 12085000) at mile 44.2 and La Grande Reservoir (station 12085500) at mile 42.5. Centralia Power Canal (station 12089208) diverts water 4.4 mi upstream from station, which is returned to river at powerplant 9.2 mi downstream from station. Centralia Power Canal was built in 1929 and put into operation in 1930. Minor diversions for irrigation upstream from station. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 50,000 ft³/s, Feb. 8 or 9, 1996, gage height, 17.13 ft, estimated based on comparison with upstream gaging stations; minimum discharge, 20 ft³/s, Sept. 10, 11, 1965, Aug. 31, 1966.
