USGS Water-Year Summary for Site 453040123065201

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	Available Parameters
	00010 Temperature, water(Min.,Max.,Mean)
	00095 Specific cond at 25C(Mean,Max.,Min.)
	00300 Dissolved oxygen(Max.,Mean,Min.)
	00400 pH(Max.,Med.,Min.)
	32295 fDOM, water, in situ(Max.,Min.,Mean)
	63680 Turbidity, Form Neph(Max.,Min.,Med.)

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

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USGS Water-Year Summary 2024

453040123065201 GALES CREEK AT OLD HWY 47, FOREST GROVE, OR

LOCATION - Lat 45°30'39.75", long 123°06'52.01" referenced to North American Datum of 1927, Washington County, OR, Hydrologic Unit 17090010, on left bank.

DRAINAGE AREA - 712 sq. mile, approximately.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

SPECIFIC CONDUCTANCE: May 2001 to December 2006 (seasonal records only), May 2007 to current year.

pH: May 2001 to December 2006 (seasonal records only), May 2007 to current year.

WATER TEMPERATURE: May 2001 to December 2006 (seasonal records only), May 2007 to current year.

DISSOLVED OXYGEN: May 2001 to December 2006 (seasonal records only), May 2007 to current year.

TURBIDITY: April 2002 to December 2006 (seasonal records only), May 2007 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. 19, 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. An additional parameter collected at this location not referenced in this document is available via NWISWeb.

EXTREMES FOR PERIOD OF DAILY RECORD -

SPECIFIC CONDUCTANCE: Maximum, 188 microsiemens Oct. 6, 2015; minimum, 36 microsiemens Dec. 9, 2015.

pH: Maximum, 7.9 units June 1, 2022; minimum, 6.5 units Feb. 8, 9, 2015.

WATER TEMPERATURE: Maximum, 28.6°C June 28, 2021; minimum, -0.1°C Dec. 8, 2009.

DISSOLVED OXYGEN: Maximum, 14.6 mg/L Dec. 16, 2008; minimum, 4.4 mg/L Dec. 1, 2012.

TURBIDITY: Maximum, >1140 FNU Dec. 3-5, 2007; minimum, <1 FNU on many days each year.