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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.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
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USGS Water-Year Summary 2024
12179000 SKAGIT RIVER ABOVE ALMA CREEK NEAR MARBLEMOUNT, WA
LOCATION - Lat 48°36'27", long 121°21'37" referenced to North American Datum of 1927, in sec.15, T.36 N., R.11 E., Skagit County, WA, Hydrologic Unit 17110005, on right bank 2.8 miles upstream from Bacon Creek, 6.9 miles northeast of Marblemount, and at river mile 85.8. Drainage area has not been determined.
DRAINAGE AREA - 1,274 mi². of which 400 mi² are in Canada.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1950 to September 1995 and June 2020 to current.
GAGE - Water-stage recorder. Elevation of is 362.80 ft. above North American Vertical Datum 88 (differential levels from NGS benchmark T375).
REMARKS - All diversions returned to river upstream from gage. Flow regulated by Ross Reservoir (station 12175000), Diablo Reservoir (station 12176500), and Gorge Reservoir (station 12177700) since 1960. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 45,800 ft³/s, Nov. 15, 2021, gage height, 20.08 ft; minimum daily discharge, 1,110 ft³/s, Oct. 7, 1979.
