USGS Water-Year Summary for Site 12101100

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00300 Dissolved oxygen(Max.,Min.,Mean)
	00400 pH(Max.,Min.,Med.)
	63680 Turbidity, Form Neph(Max.,Med.,Min.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

12101100 LAKE TAPPS DIVERSION AT DIERINGER, WA

LOCATION - Lat 47°14'18", long 122°13'37" referenced to North American Datum of 1927, in SW 1/4 NW 1/4 sec.07, T.20 N., R.5 E., Pierce County, WA, Hydrologic Unit 17110014, on right bank 850 ft downstream from White River Powerplant at Dieringer, and 1,400 ft upstream from mouth.

REVISIONS HISTORY - Discharge for the periods Apr. 14, 2018 to Apr. 15, 2018 and Dec. 30, 2018 to Dec. 31, 2018 were revised on Feb. 19, 2020, based on a re-computation of discharge during backwater. Turbidity records for the period Oct. 1, 2010 to Apr. 13, 2011 were revised on March 16, 2012.

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1958 to January 2005, April 2005 to current year.

GAGE - Water-stage recorder. Datum of gage is 42.36 ft above NGVD of 1929 (levels by Puget Sound Power and Light Co.) and is 46.004 ft above NAVD of 1988 (GNSS survey by USGS on June 21, 2022). Prior to September 30, 1990, at same site at datum 5.00 ft higher.

REMARKS - Flow regulated by White River Powerplant. U.S. Geological Survey satellite telemeter at station.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,530 ft³/s, Jan. 29, 1965, gage height, 6.23 ft, datum then in use; maximum gage height, 12.66 ft, Jan. 9, 2009 (backwater from White River); no flow many days in July and August 1990, Sept. 29, 1993, July 8-10, Sept. 4, 2010, and many days most years since May 2015.

WATER-QUALITY RECORDS

PERIOD OF RECORD - CHEMICAL DATA: July to December 2010.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: May 2010 to current year. pH: May 2010 to current year. WATER TEMPERATURE: May 2010 to current year. DISSOLVED OXYGEN: May 2010 to current year. TURBIDITY: May 2010 to current year.

INSTRUMENTATION - Multiparameter water quality sonde interfaced with a Data Collection Platform/Electronic Datalogger with 15-min recording interval, since May 2010. Turbidity sensor is a 6136 sensor installed on a YSI 6920 V2-2 sonde. Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.

REMARKS - Additional details are available from the Washington Water Science Center. Continuous water quality record is no longer rated, as of water year 2019. Prior ratings can be obtained via request to the Washington Water Science Center.

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum recorded, 2,270 uS/cm, Aug. 31, 2010; minimum, 25 uS/cm, Dec. 30, 2019. pH: Maximum, 10.4 units, several days in Aug. and Sept., 2014; minimum recorded, 6.3 units, Sept. 23, 2023. WATER TEMPERATURE: Maximum recorded, 28.6°C, July 31, 2014; minimum, 2.5°C, Jan. 4, 2017. DISSOLVED OXYGEN: Maximum recorded, 26.4 mg/L, Apr. 09, 2020; minimum recorded, 0.3 mg/L, Sept. 5, 2014. TURBIDITY: Maximum recorded, >1,100 FNU, June 2, 2010 and Nov. 15, 2015; minimum recorded, 0.0 FNU, on several days in water years 2012, 2013 and 2020.