LOCATION.--Lat 43° 56'46", long 113° 39'19"(Rev.)(NAD83), in SE1/4 SW1/4 sec.7, T.7 N., R.24 E., Custer County, Hydrologic Unit 17040218, Mackay Reservoir quad., 1,600 ft downstream from head of ditch, 0.8 mi downstream from Mackay Reservoir, and 3.5 mi northwest of Mackay.

PERIOD OF RECORD.--June 1912 to October 1914, March 1919 to October 1969 (discontinued) (seasonal records only 1912-14, 1919-20, 1923-26, 1930, 1937).

GAGE.--Water-stage recorder and broad-crested weir. Datum of gage is 5,984.98 ft above NGVD of 1929. Prior to Oct. 1, 1936, and June 24, 1938 to Apr. 24, 1939, nonrecording gage, and Oct. 1, 1936 to June 23, 1938, water-stage recorder, at several sites 1,300 to 1,600 ft upstream at various datums.

REMARKS.--Sharp ditch diverts from east side of Big Lost River in SE1/4 sec.12, T.7 N., R.23 E., 0.5 mi downstream from Mackay Reservoir and 1 mi upstream from station on Big Lost River below Mackay Reservoir, near Mackay (sta 13127000). Water used for irrigation northwest of Mackay and above Streeter ditch. Hintze ditch, which diverts from Sharp ditch above station, was reported by watermaster, and is listed in yearly (and/or summary) reports for this site.

EXTREMES FOR PERIOD OF RECORD.--Maximum daily discharge, 53 ft³/s June 21, 1968; no flow at times in most years.