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Water-Year Summary for Site 12122000

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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.
Available Parameters
62614 Elevation, lake/res, NGVD29(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023
LOCATION - Lat 47°34'36", long 122°06'36" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 sec.12, T.24 N., R.5 E., King County, WA, Hydrologic Unit 17110012, on west shore 5.6 mi above lake outlet, and 6.5 mi south of Redmond. Prior to Sept. 21, 2009, at site 0.2 mi north.
DRAINAGE AREA - 99.6 mi². includes 1.9 mi² of Cedar River drainage from upper Rock Creek, which normally is diverted into Issaquah Creek.
REVISIONS HISTORY - WSP 1446: Drainage area.
PERIOD OF RECORD - January 1939 to current year.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 and is 3.278 ft above NAVD of 1988. Prior to June 22, 1942, nonrecording gage at different site at datum 25.04 ft higher. June 22, 1942, to Aug. 22, 1951, nonrecording gage at different site at datum 25.04 ft higher and Aug. 23, 1951, to Sept. 30, 1996, at datum 24.04 ft higher, April 29, 1965, to Sept. 21, 2009, recording gage at site 0.2 mi. north.
REMARKS - Minor regulation on tributaries. Many small diversions from tributaries for irrigation and domestic use. U.S. Geological Survey satellite telemeter at station.
EXTREMES OUTSIDE PERIOD OF RECORD - An elevation of 34.87 ft, present datum, was observed on Dec. 22, 1933, from information provided by Corps of Engineers.
EXTREMES FOR PERIOD OF RECORD - Maximum elevation observed, 33.44 ft, present datum, Feb. 12, 1951; minimum observed, 25.13 ft, Aug. 25-27, 1951.