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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.
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USGS Water-Year Summary 2024
13120500 BIG LOST RIVER AT HOWELL RANCH, NEAR CHILLY, ID
LOCATION - Lat 43°59'54", long 114°01'16" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 sec.30, T.8 N., R.21 E., Custer County, ID, Hydrologic Unit 17040218, Harry Canyon quad., on left bank at Howell Ranch, 2.1 mi downstream from Burnt Creek, 7.7 mi downstream from East Fork, 9 mi southwest of Chilly, and 21 mi northwest of Mackay.
DRAINAGE AREA - 440 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - April 1904 to November 1914, May 1920 to current year (no winter records 1904, 1906-14, 1920-48).
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 6,626.34 feet above NAVD 1988. Prior to Apr. 20, 1906, staff gage at site 1.25 miles downstream at different datum. Apr. 20, 1906 to June 6, 1912, staff gage at site 100 ft. downstream at different datum. June 7, 1912 to Nov. 14, 1914, staff gage at present site at datum 2.07 ft lower. May 11 to June 16, 1920, staff gage at present site and datum.
REMARKS - Diversions above station for irrigation of about 3,000 acres (1966 determination).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 5,010 ft³/s May 21, 2006, gage height, 5.68 ft; minimum observed, 19 ft³/s Dec. 12, 1939, from discharge measurement.
