USGS Water-Year Summary for Site 14202980

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

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

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USGS Water-Year Summary 2024

14202980 SCOGGINS CREEK BELOW HENRY HAGG LAKE, NEAR GASTON, OR

LOCATION - Lat 45°28'10", long 123°11'56" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.20, T.1 S., R.4 W., Washington County, OR, Hydrologic Unit 17090010, on left bank 600 ft downstream from Scoggins Dam, 800 ft upstream from small left bank tributary, 3.7 mi northwest of Gaston and at mile 4.8.

DRAINAGE AREA - 38.8 mi².

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: April 2002 to current year.

pH: April 2002 to current year.

WATER TEMPERATURE: April 2002 to current year.

DISSOLVED OXYGEN: April 2002 to current year.

TURBIDITY: May 2008 to current year.

INSTRUMENTATION - Water-quality monitor. 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 - TURBIDITY: Data collected using a YSI EXO2 sonde. Manufacturer's stated accuracy is the greater of +/- 2 percent or 0.3 Formazin Nephelometric Units (FNU) for 0-999 FNU, and +/- 5 percent for 1,000-4,000 FNU. Prior to Dec. 8, 2014, data collected using a YSI 6026 turbidity sensor. Manufacturer's stated accuracy is the greater of +/- 5 percent or 2 FNU. FNU values below 10 are reported to nearest 0.1 FNU. Negative recorded values are reported as 0.0 FNU.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum, 81 microsiemens Nov. 30, Dec. 1, 2005; minimum, 44 microsiemens Aug. 11, 2002.

pH: Maximum, 8.8 units June 6, 2010; minimum, 6.3 units July 12, 13, 24-27, Aug. 9-12, 18-22, 2004, July 17-19, Aug. 4-19, 2006.

WATER TEMPERATURE: Maximum, 22.8°C July 20, 21, 2005; minimum, 3.6°C Jan. 15, 16, 2017.

DISSOLVED OXYGEN: Maximum, 14.6 mg/L Jan. 15, 16, 2017; minimum, 7.2 mg/L Sept. 25, 26, 2003.

TURBIDITY: Maximum, 140 FNU Jan. 5, 2009; minimum, <1 FNU on many days each year.