USGS Water-Year Summary 2023
06090000 Missouri River at Great Falls MT
LOCATION - Lat 47°30'25", long 111°18'48" referenced to North American Datum of 1927, Cascade County, MT, Hydrologic Unit 10030102, in NE 1/4 NW 1/4 NE 1/4 sec.11, T.20 N., R.3 E., Cascade County, on left upstream bridge rail on the Central Avenue bridge over the Missouri River in Great Falls, 0.85 miles downstream from Sun River.
DRAINAGE AREA - 22,728 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 20, 2014 to current year.
GAGE - Water-stage recorder. Elevation of gage is 3,300.00 ft, referenced to the North American Vertical Datum of 1988.