USGS Water-Year Summary 2023
06078200 MISSOURI RIVER NEAR ULM, MT
LOCATION - Lat 47°26'05.88", long 111°23'18.40" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 NW 1/4 sec.5, T.19 N., R.3 E., Cascade County, MT, Hydrologic Unit 10030102, on left bank 5.6 mi east of Ulm, 9.1 mi downstream from Smith River, and at river mile 2,140.4.
DRAINAGE AREA - 20,605 mi².
PERIOD OF RECORD - August 1957 to current year.
GAGE - Water-stage recorder. Elevation of gage is 3,313.27 ft, referenced to the National Geodetic Vertical Datum of 1929.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in June 1953 reached a stage of about 17 ft; discharge, 35,000 ft³/s. Flood in June 1948 reached a stage of about 16 ft; discharge, 32,000 ft³/s, from information by local residents.