USGS Water-Year Summary for Site 14216500

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	Available Parameters
	00060 Discharge(Mean)
	00065 Gage height(Mean)

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

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USGS Water-Year Summary 2023

14216500 MUDDY RIVER BELOW CLEAR CREEK, NEAR COUGAR, WA

LOCATION - Lat 46°04'33", long 121°59'51" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.24, T.7 N., R.6 E., Skamania County, WA, Hydrologic Unit 17080002, Gifford Pinchot National Forest, on left bank 3.9 mi downstream from Clear Creek, approximately 14 mi northeast of Cougar, and 0.5 mi upstream from mouth.

DRAINAGE AREA - 135 mi².

REVISIONS HISTORY - WDR WA-99-1: 1991 (m), 1996-97 (M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 1927 to September 1934, October 1954 to December 1973 (destroyed by flood of January 1974), October 1983 to current year. Monthly discharge only for October, December 1933 and January 1934 published in WSP 1318. Published as "near Cougar" 1927-34. Records for August to October 1909, published in WSP 272 and 492, have been found to be unreliable and should not be used.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,032.90 ft above NGVD of 1929, and 1,035.61 ft above NAVD of 1988 (USGS GNSS Level II Survey, Apr. 10, 2023). August 1927 to September 1934, at same site at different datum; October 1954 to December 1973 at site 3.7 mi upstream at different datum.

REMARKS - No regulation or diversion upstream from station. U.S. Geological Survey satellite telemeter at station. Prior to Water Year 2014, published average discharge included monthly data published in WSP 1318.

EXTREMES OUTSIDE PERIOD OF RECORD - A flood occurred about 0900 hours on May 18, 1980, from a mudflow caused by the eruption of Mount St. Helens.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 25,000 ft³/s, Feb. 8, 1996, gage height, 33.26 ft from high-water marks, from rating curve extended above 8,000 ft³/s; minimum, 89 ft³/s Oct. 5-7, 2015.

WATER-QUALITY RECORDS

PERIOD OF RECORD - October 1983 to Sept 30, 2013.

PERIOD OF DAILY RECORD - SUSPENDED SEDIMENT DISCHARGE: October 1983 to March 1995, October 1998 to September 2005. Water years 1995, 1996, 2006-2013 daily sediment discharge values for period October to March, monthly sediment discharge values only for the period April to September. Water years 1997 and 1998, annual sediment discharge estimates only (on file at the Cascades Volcano Observatory in Vancouver, WA). Records prior to October 1985 are published in U.S. Geological Survey Open-File Report 85-632; records for 1984-87 are published in U.S. Geological Survey Open-File Report 91-219.

INSTRUMENTATION - Water-quality monitor May 1990 to September 1991. Automatic pumping sediment sampler August 1983 to September 1996, October 1998 to September 2005, and October 1, 2006 to September 30, 2013.

EXTREMES FOR PERIOD OF DAILY RECORD - SEDIMENT CONCENTRATION: Maximum daily, 39,800 mg/L, Nov. 6, 2006; minimum daily, 1 mg/L, on several days in water years 2001-03, 05. SEDIMENT DISCHARGE: Maximum daily, 1,400,000 tons (estimated), Feb. 8, 1996; minimum daily, 0.34 tons, Oct. 11, 30, 2003.