USGS Water-Year Summary for Site 12395500

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

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USGS Water-Year Summary 2023

12395500 PEND OREILLE RIVER AT NEWPORT, WA

LOCATION - Lat 48°10'56", long 117°02'03" referenced to North American Datum of 1983, in sec.24, T.56 N., R.6 W., Bonner County, ID, Hydrologic Unit 17010216, Newport quad., on left bank at Newport, 0.2 mi upstream from bridge on U.S. Highway 2, 0.2 mi east of Idaho-Washington State line, 1.6 mi downstream from Albeni Falls Dam, and at mile 88.5.

DRAINAGE AREA - 24,200 mi².

REVISIONS HISTORY - WSP 532: 1903-11.

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1903 to September 1912, October 1929 to October 1941, October 1952 to current year. Prior to October 1921, published as "Clark Fork at Newport, Wash.," October 1921 to September 1937, as "Clark Fork at Priest River, Idaho," and October 1937 to September 1941, as "Pend Oreille River at Priest River, Idaho."

GAGE - Water-stage recorder. Datum of gage is 1,999.7 ft above NGVD of 1929. Prior to Sept. 22, 1928, non recording gages at Priest River, Newport, or Metaline Falls at various datums (see description, WSP 532, p. 92). Sept. 22, 1928 to Sept. 30, 1935, at datum 40.44 ft higher, and Oct. 1, 1935 to Sept. 30, 1941, water-stage recorder at datum 0.30 ft higher. Since December 1952, auxiliary water-stage recorder 2.74 mi downstream from base gage.

REMARKS - Flow regulated at Albeni Falls Dam and affected by storage in Pend Oreille Lake (see station 12392500), Flathead Lake, Hungry Horse Reservoir, and several smaller reservoirs. Diversions above station for irrigation of about 354,000 acres. Stage-discharge relation affected by backwater from Box Canyon dam 54 mi downstream. Discharge computed from slope and conveyance of reach between base and auxiliary gage.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 1894 reached a stage of about 64.0 ft, present site and datum, (from water surface profiles) discharge, about 200,000 ft³/s.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 136,000 ft³/s June 15, 1913, June 21, 1933, June 12, 1972; minimum, 1,280 ft³/s Sept. 1, 1961.