USGS Water-Year Summary for Site 14246900

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	Available Parameters
	00060 Discharge(Mean)
	63680 Turbidity, Form Neph(Med.,Min.,Max.)
	72137 Discharge,tide fltrd(Mean)
	80297 SS load, regres ss(Mean) [Suspended Sediment Load]

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

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USGS Water-Year Summary 2023

14246900 COLUMBIA RIVER AT PORT WESTWARD, NEAR QUINCY, OR

LOCATION - Lat 46°10'53", long 123°10'56" referenced to North American Datum of 1927, in NE 1/4 sec.16, T.8 N., R.4 W., Columbia County, OR, Hydrologic Unit 17080003, on left bank, 0.7 mi downstream from Crims Island, 3.0 mi northwest of Quincy and at mile 53.8.

DRAINAGE AREA - 256,900 mi². approximately.

SURFACE-WATER RECORDS

PERIOD OF RECORD - May 1968 to June 1970, June 1991 to current year. Prior to 2017, published as "at Beaver Army Terminal, near Quincy."

GAGE - Water-stage recorder and acoustic velocity meter. Datum of gage is Columbia River Datum. Subtract 1.00 ft from gage heights to convert to NGVD of 1929 gage heights. May 1968 to June 1970, water-stage recorder with auxiliary water-stage recorder at site 5.6 mi downstream, at datum 10.00 ft lower; June 27, 1991 to September 30, 2004, at present site, at datum 1.52 ft higher.

REMARKS - Flow regulated by many reservoirs on Columbia River and in tributary basins. Flow significantly affected by astronomical tides, which can cause reverse flow during tidal cycle when daily mean discharges are less than 250,000 ft³/s. Daily mean discharges since water year 2007 are computed from filtered unit value discharge data. The Godin low-pass filter is used to remove tidal variations from unit values. Continuous water-quality records for some prior periods have been collected at this location. Chemical analyses and periodic suspended sediment data collected at this location are available via NWISWeb.

EXTREMES FOR PERIOD OF RECORD - Maximum daily discharge, 864,000 ft³/s Feb. 10, 1996; minimum daily discharge, 63,600 ft³/s Sept. 9, 2001; minimum unfiltered discharge recorded since water year 2007, -279,000 ft³/s Oct. 15, 2012, but may have been less during periods of missing record.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

TURBIDITY: November 2015 to current year.

SUSPENDED SEDIMENT: October 2015 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 Forest Technology DTS-12 turbidity sensor. Manufacturer's stated accuracy is +/- 2 percent of reading 0-399 and +/- 4 percent of reading 400-1600 Formazin Nephelometric Units. FNU values below 10 are reported to nearest 0.1 FNU. Negative recorded values are reported as 0.0 FNU.

EXTREMES FOR PERIOD OF RECORD -

TURBIDITY: Maximum, 285 FNU Dec. 9, 2015; minimum 0.9 FNU Sept. 15, 2017.

SUSPENDED SEDIMENT: Maximum, 285 mg/l, Dec. 9, 2015, Oct. 21, 2017; minimum 0.9 mg/l, Oct. 8, 2016.