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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
12120000 MERCER CREEK NEAR BELLEVUE, WA
LOCATION - Lat 47°36'11", long 122°10'47" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.04, T.24 N., R.5 E., King County, WA, Hydrologic Unit 17110012, on left bank 40 ft upstream from Burlington Northern Railroad trestle, 1.2 mi southeast of Bellevue, and 2.0 mi upstream from mouth.
DRAINAGE AREA - 12 mi².
REVISIONS HISTORY - WSP 1446: Drainage area. WDR WA-83-1: 1977-79(P).
SURFACE-WATER RECORDS
PERIOD OF RECORD - June to October 1945, June 1955 to current year.
GAGE - Water-stage recorder. Datum of gage is 16.11 ft above NGVD of 1929 (levels by Municipality of Metropolitan Seattle engineers). Prior to June 5, 1959, at site 600 ft downstream at different datums. June 5, 1959 to Sept. 30, 2005 at datum one foot higher.
REMARKS - Natural flow affected by urbanization and construction of flood-control catchments. U.S. Geological Survey satellite telemeter at station.
- Water Years 2014 and 2015: No estimated daily discharge. Records fair.
- Water Years 2016 and 2017: Records fair.
- Water Years 2018 and 2019: No estimated discharge. Records fair.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 908 ft³/s, Dec. 3, 2007, gage height, 7.80 ft; maximum gage height, 9.68 ft, present datum, Mar. 6, 1972, caused by backwater from plugged culvert; minimum discharge, 1.9 ft³/s, Aug. 6, 1958.
WATER-QUALITY RECORDS
PERIOD OF RECORD - August 2005 (discontinued).
