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Water-Year Summary for Site 12143800

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Available Parameters
00065 Gage height(Obs.)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
12143800 RATTLESNAKE LAKE AT CEDAR FALLS, WA
LOCATION - Lat 47°25'39", long 121°46'29" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 sec.34, T.23 N., R.8 E., King County, WA, Hydrologic Unit 17110010, on southeast shore, and 0.6 mi northeast of town of Cedar Falls.
DRAINAGE AREA - 1.86 mi².
REVISIONS HISTORY - Gage height for May 4, 2019 was revised on July 6, 2021, based on inaccurately reporting an estimated value.
SURFACE-WATER RECORDS
PERIOD OF RECORD - November to December 1945 (fragmentary), January 1953 to current year. Extremes prior to October 1960 published in WSP 1932 and daily gage heights are available in files of the U.S. Geological Survey.
GAGE - Nonrecording gage. Datum of gage is 10.73 ft above NAVD88 (USGS GNSS survey) and 7.25 ft above NGVD of 1929 (levels by City of Seattle).
COOPERATION - Gage readings furnished by City of Seattle Water Department.
REMARKS - No diversions. Inflow is mostly seepage from Chester Morse Lake. Most outflow from lake is seepage; however, when the lake level exceeds 906 ft gage height, surface-water discharge flows through Rattlesnake Ditch toward Boxley Creek.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height observed, 911.80 ft, Nov. 25, 26, 1959; minimum observed, 852.80 ft, Jan. 9, 1953, but may have been less during Dec. 13, 1965, to Jan. 3, 1966, and Nov. 10 to Dec. 23, 1970, when water was below gage.