USGS Water-Year Summary for Site 13311000

Click to hide Water-Year Summary instructions and information

Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
Not all sites have reports available for every water year.

	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)
	00400 pH(Max.,Min.,Med.)

Select a water year

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

Print this page

USGS Water-Year Summary 2024

13311000 EAST FORK OF SOUTH FORK SALMON RIVER AT STIBNITE, ID

LOCATION - Lat 44°54'20.6", long 115°19'46.2" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 SW 1/4 sec.11, T.18 N., R.9 E., Valley County, ID, Hydrologic Unit 17060208, Stibnite quad., Boise National Forest, on right bank, 9 miles southeast of Yellow Pine.

DRAINAGE AREA - 19.3 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - July 1928 to November 1941, December 1941 to September 1943 (fragmentary records only), October 1982 to September 1997, October 2010 to current year.

GAGE - Water-stage recorder. Elevation of gage datum is arbitrary. Prior to Sept. 18, 1929, staff gage at site 1,090 ft upstream at different datum. Sept. 18, 1929 to Sept. 7, 1943 at site 1,100 ft upstream at different datum.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 430 ft³/s, May 31, 2017, gage height, 7.04 ft; maximum gage height 7.11 ft May 31, 1986; minimum recorded, 2.0 ft³/s Oct. 29, 1936, gage height, 1.71 ft, site and datum then in use.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Continuous water temperature, specific conductance, and pH were collected seasonally on site between Sept. 2011 and Sept. 2014. Continuous water temperature and specific conductance data collection resumed Mar. 2016 and is current.

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, specific conductance, and pH records for the year is good.

During water year 2014, the water-quality sensor was removed for the winter on Oct. 22, re-installed on site on Apr. 25, and removed indefinitely on Sept. 30. Daily values are missing for each parameter on Apr. 25 and Sept. 30. 98.7 percent of the daily mean or median values for temperature, specific conductance, and pH will be reported. There are no daily values that are or will be estimated.

Water Year 2016: Water-quality sonde was installed on site on Mar. 30 and removed Oct. 4 for winter. Quality of water temperature and specific conductance for the year is good except for:
SPECIFIC CONDUCTANCE: Apr. 26-. 27 and May 16: Fair, due to fouling.
Apr. 28-May 9, May 10-11, May 17-18, May 19: Poor, due to large variance in the record.
98.4% of daily values for water temperature and 95.7% of daily values for specific conductance will be reported. There are not daily values that are or will be estimated.

Water Year 2017: Water-quality sonde was installed on site on Apr. 11 and removed Nov. 15, 2017 for winter.
The practice of assigning qualitative accuracy ratings to continuous water-quality data was discontinued in WY2017.