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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.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
12147680 PHELPS CREEK BLW UNNAMED TRIB NR INDEX, WA
LOCATION - Lat 47°42'14.99", long 121°36'02.79" referenced to North American Datum of 1983, in sec.25, T.26 N., R.9 E., King County, WA, Hydrologic Unit 17110010, on left bank 0.3 mi upstream from confluence with S.F. Tolt River, 8.1 mi south of Index, and at mile 12.9.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2019 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,846 ft above NAVD of 1988.
REMARKS - No regulation or diversion upstream from station. U.S. Geological Survey satellite telemeter at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 992 ft³/s, Nov. 4, 2022; gage height, 8.75 ft; minimum daily discharge, 0.44 ft³/s, Oct. 7, 2022.
