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- 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.
USGS Water-Year Summary 2024
13192200 SOUTH FORK BOISE RIVER AT NEAL BRIDGE NEAR ARROWROCK DAM, ID
LOCATION - Lat 43°33'02", long 115°43'19" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 SE 1/4 sec.34, T.3 N., R.6 E., Elmore County, ID, Hydrologic Unit 17050113, Long Gulch quad., 0.16 mi upstream from Blacks Creek Road crossing and at mile 10.5.
DRAINAGE AREA - 1,172 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 2011 to September 2019.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage datum is arbitrary.
REMARKS - Flow regulated by Anderson Ranch Reservior (see station 13190000).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 8,970 ft³/s on May 12, 2017, gage height, 15.69 ft; minimum discharge, 249 ft³/s Sept. 13, 2013, but may have been less during period of ice effect, gage height, 6.44 ft.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Continuous water temperature data were collected from May 2011 to current year.
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: Records good. Water Year 2015: Records good. There are 3 days of missing/deleted data from Oct. 1 to Sept. 30. 99.2% of the mean daily values will be reported for water temperature. Water Year 2016: Records good. Water Year 2017: The practice of using qualitative ratings to describe data accuracy was discontinued in water year 2017.
