USGS Water-Year Summary 2021
05267000 MISSISSIPPI RIVER NEAR ROYALTON, MN
LOCATION - Lat 45°49'34", long 94°21'18" referenced to North American Datum of 1927, in SE 1/4 sec.32, T.39 N., R.32 W., Morrison County, MN, Hydrologic Unit 07010201, on left bank at upstream side of bridge on County Highway 26, 2.5 mi west of Royalton, and at mile 954 upstream from Ohio River.
DRAINAGE AREA - 11,600 mi². (approximately).
- Unpublished, 2009: 1982(M).
PERIOD OF RECORD - March 1924 to Sept. 30, 1993, discharges obtained from Minnesota Power and adjusted to U.S. Geological Survey streamflow measurements; Oct. 1993 to Sept. 30, 2000, discharges flow-averaged between Mississippi River at Ft. Ripley (05261000) and Mississippi River at St. Cloud (05270700); Oct. 2000 to July, 2001, discharges obtained from Minnesota Power and adjusted to U.S. Geological Survey streamflow measurements; July 2001 to current year.
GAGE - Water-stage recorder.
COOPERATION - Minnesota Power Company in connection with a Federal Energy Regulatory Commission project.
EXTREMES FOR PERIOD OF RECORD - Maximum daily-mean discharge 38,200 cfs, Apr. 8, 1997, estimated due to backwater from ice.