USGS Water-Year Summary 2020
12508990 YAKIMA RIVER AT MABTON, WA
LOCATION - Lat 46°13'53", long 119°59'54" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.30, T.9 N., R.23 E., Yakima County, WA, Hydrologic Unit 17030003, on right bank at highway bridge, at east boundary of Yakama Nation Reservation, 1.1 mi north of Mabton, and at mile 59.8.
DRAINAGE AREA - 5,359 mi².
PERIOD OF RECORD - October 1970 to current year.
GAGE - Water-stage recorder. Elevation of gage is 643 ft above NGVD of 1929, from topographic map. Prior to Oct. 1, 1976, at datum 10 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 49,500 ft³/s, Feb. 10, 1996, gage height, 28.18 ft, present datum from high-water mark; minimum daily discharge, 320 ft³/s, Mar. 25, 1977.