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USGS Water-Year Summary 2024
06080900 Sun River below Diversion Dam, near Augusta MT
LOCATION - Lat 47°37'06.62", long 112°41'31.40" referenced to North American Datum of 1983, Lewis and Clark County, MT, Hydrologic Unit 10030104, Lewis and Clark National Forest, on road bridge 1 mile (1.6 km) downstream from diversion dam, 16.5 miles northwest of Augusta, MT, and at mile 95.6 (153.8 km).
DRAINAGE AREA - 610 mi².
REVISIONS HISTORY - Had to Revise the Stage and Discharge record from April 28th 2020 to July 10, 2020.
SURFACE-WATER RECORDS
PERIOD OF RECORD - September 1967 to October 1980, April 2016 to current year.
GAGE - Water-stage recorder. Elevation of the gage is 4,363.27 ft (GNSS III survey by Morrison Maierle), referenced to North American Vertical Datum of 1988. Prior to Feb. 23, 2024, the datum of gage was reported as 4,370 ft, referenced to the North American Vertical Datum of 1988. From October 1967 to October 1980 a recording gage was present at this site. From October 1985 to April 2016, a non-recording gage was present and multiple miscellaneous measurements were made during this time period.
REMARKS - Flow regulated by Gibson Dam. Diversions above station into Pishkun Canal and Willow Creek
feeder canal for irrigation below station.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge known, 59,700 ft³/s June 9, 1964, from computation of peak flow over dam 1 mile upstream; gage height, about 24.8 feet, from levels of Aug. 12, 1971.
