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Water-Year Summary for Site 12118400

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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.
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Available Parameters
00045 Precipitation(Max.,Sum)  
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
12118400 ROCK CREEK AT STATE HIGHWAY 516, NEAR RAVENSDALE, WA
LOCATION - Lat 47°21'45", long 122°00'35" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 sec.26, T.22 N., R.6 E., King County, WA, Hydrologic Unit 17110012, on right bank in front of Parshall Flume, upstream of State Hwy 516, 1.5 mi northwest of Ravensdale.
DRAINAGE AREA - 11.2 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 1956 to September 1962. May 2001 to current year. Published as "at State Highway 5A" 1956-62.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 559.24 ft above NAVD of 1988 (Levels from City of Kent). Prior to May 2001, recording gage at same site at different datum.
REMARKS - U.S. Geological Survey satellite telemeter at station. Diversions upstream of gage by City of Kent for municipal use may affect flow. 
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 336 ft³/s, Feb. 7, 2020, gage height 3.71 ft; minimum, 0.86 ft³/s, Nov. 2, 2002.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - PRECIPITATION: October 2003 to current year.
INSTRUMENTATION - Tipping bucket rain gage. Electronic data logger with 15-min. recording interval.
EXTREMES FOR PERIOD OF RECORD - Maximum daily precipitation, 4.13 in., Oct. 20, 2003.
REMARKS - Additional details are available from the Washington Water Science Center. Precipitation record is no longer rated, as of water year 2020. Prior ratings can be obtained via request to the Washington Water Science Center.