USGS Water-Year Summary for Site 13342500

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	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.)
	00060 Discharge(Mean)
	80297 SS load, regres ss(Mean)
	99246 Upper 90% limit, SSC(Mean)
	99247 Lower 90% limit, SSC(Mean)
	99409 Susp sediment,wu,est(Mean)

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Water year 2024: 2023-10-01 to 2024-09-30

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USGS Water-Year Summary 2024

13342500 CLEARWATER RIVER AT SPALDING, ID

LOCATION - Lat 46°26'54", long 116°49'39" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 SW 1/4 sec.22, T.36 N., R.4 W., Nez Perce County, ID, Hydrologic Unit 17060306, Lapwai quad., Nez Perce Indian Reservation, on left bank 0.4 mi downstream from Lapwai Creek, 0.6 mi west of Spalding Post Office, 0.9 mi upstream from U.S. Highway 95 bridge, and at mile 11.6.

DRAINAGE AREA - 9,283 mi².

REVISIONS HISTORY - WSP 1737: 1927, 1935, 1943. WDR-US-2010: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 1910 to October 1913, October 1924 to January 1925, April 1925 to current year. Published as "near Lewiston", 1910-13, 1924-27. Records published for both sites March 1926 to September 1927.

GAGE - Water-stage recorder, crest-stage gage, temperature sensor. Datum of gage is 770.49 ft above NGVD of 1929. Aug. 23, 1910 to Oct. 31, 1913, staff gage at datum about 731.5 ft and Oct. 2, 1924 to Sept. 30, 1926, water-stage recorder at datum 730.23 ft at sites 7 mi downstream. Oct. 1, 1926 to Sept. 21, 1928, staff gage at highway bridge 3,100 ft upstream from present gage at datum 772.49 ft above mean sea level (datum of 1929, supplementary adjustment of 1947). Sept. 22, 1928 to Sept. 30, 1962, water-stage recorder at site 800 ft upstream at same datum. Staff or wire-weight gage at bridge site and datum 3,100 ft upstream used as supplementary gage since 1928. Sept. 1, 1961 to May 17, 1962, staff gage at Northern Pacific Railroad bridge 1.2 mi upstream at different datum used as supplementary gage. Oct. 1, 1962 to Sept. 20, 1967, graphic water-stage recorder at present site and datum.

REMARKS - Diversions above station for irrigation of about 1,630 acres (1966 determination). Regulation of the North Fork Clearwater River at Ahsahka began on Sept. 27, 1971, when diversion tunnel at Dworshak Dam was closed.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood of June 1894 reached a stage of 20.8 ft, site and datum in use 1924-26, discharge, 136,000 ft³/s.

EXTREMES FOR PERIOD OF RECORD - UNREGULATED PERIOD (1911-71): Maximum discharge prior to regulation by Dworshak Reservoir, 177,000 ft³/s May 29, 1948, gage height, 23.76 ft; maximum gage height, 27.77 ft, Feb. 5, 1963, from floodmark (ice jam); minimum daily discharge, 500 ft³/s Jan. 9, 1937, Dec. 1, 1952. REGULATED PERIOD (1972 to current year): Maximum discharge since regulation began, 131,000 ft³/s June 16, 1974, gage height, 19.10 ft; minimum, 1,350 ft³/s Oct. 31, 1971, gage height, 2.47 ft.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD -
Water temperature: Water years 1959-70, 1972 to current year.
Sediment: 2014 to 2018.

REMARKS - Numerical uncertainty is not currently computed for time-series water-quality records but qualitative ratings are provided based on professional judgment.

Water Year 2014: Quality of water temperature records is good.

Water Year 2015: Quality of water temperature records is good.

Water Year 2016: Quality of water temperature records is fair.

The practice of using qualitative ratings to describe data accuracy was discontinued in Water Year 2017