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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.
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USGS Water-Year Summary 2024
13120000 NORTH FORK BIG LOST RIVER AT WILD HORSE, NEAR CHILLY, ID
LOCATION - Lat 43°55'58", long 114°06'50" referenced to North American Datum of 1983, in NE 1/4 SE 1/4 sec.17, T.7 N., R.20 E., Custer County, ID, Hydrologic Unit 17040218, Harry Canyon quad., Challis National Forest, on right bank 0.2 mi upstream from East Fork, 2 mi downstream from Wild Horse damsite, and 16 mi southwest of Chilly.
DRAINAGE AREA - 115 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1944 to current year. Prior to October 1967, published as "Big Lost River at Wild Horse, near Chilly".
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 6,861.97 feet above NAVD 1988.
REMARKS - Many small diversions upstream for local irrigation.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,170 ft³/s May 21, 2006, gage height, 6.41 ft; minimum, 4.9 ft³/s Feb. 17, 1988, gage height, 0.92 ft, result of freeze-up.
