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Water-Year Summary for Site 12087000

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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)  
00065 Gage height(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
12087000 MASHEL RIVER NEAR LA GRANDE, WA
LOCATION - Lat 46°51'25", long 122°18'05" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.21, T.16 N., R.4 E., Pierce County, WA, Hydrologic Unit 17110015, on left bank, 50 ft downstream from State Highway 7 bridge, 1.8 mi northeast of La Grande, and at mile 3.3.
DRAINAGE AREA - 80.7 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1940 to September 1957, October 1991 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 619.53 ft above NGVD of 1929 (from topographic map) and is 623.04 ft above NAVD of 1988 (levels by USGS, Aug. 15, 2022). Prior to Oct. 1, 1957, on right bank at same datum.
REMARKS - Small diversion for municipal supply for Eatonville. Some regulation at low flow by millpond in Eatonville. U.S. Geological Survey satellite telemeter at station. 
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,520 ft³/s, Feb. 6, 2020, gage height, 7.94 ft, from rating curve extended above 6,920 ft³/s; minimum discharge, 1.35 ft³/s, Sep. 9, 2021.