USGS Water-Year Summary 2024

13190500 SOUTH FORK BOISE RIVER AT ANDERSON RANCH DAM, ID

LOCATION - Lat 43°20'37", long 115°28'39" referenced to North American Datum of 1983, in SW 1/4 sec.11, T.1 S., R.8 E., Elmore County, ID, Hydrologic Unit 17050113, Anderson Ranch Dam quad., Boise National Forest, on right bank 600 ft upstream from Dixie Creek, 1.8 mi downstream from Anderson Ranch Dam, 2.2 mi northwest of Bennett, and at mile 41.5.

DRAINAGE AREA - 978 mi².

REVISIONS HISTORY - WDR-US-2010: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - April 1943 to current year (includes flow of Dixie Creek prior to October 1946).

GAGE - Water-stage recorder. Elevation of gage datum is arbitrary.

REMARKS - Flow regulated by Anderson Ranch Reservoir, 1.8 mi upstream (see station 13190000) beginning Dec. 15, 1945. Flow of Little Camas Creek is stored in Little Camas Reservoir, capacity, 22,300 acre-ft, no spill most years, and diverted out of basin through Little Camas Canal for irrigation of about 5,000 acres (1966 determination).

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,850 ft³/s May 25, 1956, gage height, 10.56 ft; maximum gage height, 10.61 ft, May 13, 2017; minimum discharge, 0.10 ft³/s Nov. 13, 1959; minimum gage height, 0.99 ft, Feb. 16, 1950.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Continuous water temperature data were collected from October 2019 to current year.

REMARKS - The practice of using qualitative ratings to describe data accuracy was discontinued in water year 2017.