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Water-Year Summary for Site 04063000

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023
LOCATION - Lat 45°57'05", long 88°11'21" referenced to North American Datum of 1927, in SE 1/4 sec.12, T.41 N., R.18 E., Florence County, WI, Hydrologic Unit 04030108, on right bank 0.4 mi downstream from confluence of Brule and Michigamme Rivers, 3.5 mi northeast of Florence, WI, and at mile 117.
DRAINAGE AREA - 1,760 mi².
REVISIONS HISTORY - WSP 1707: 1953(M). WDR MI-92-1: Drainage area.
PERIOD OF RECORD - January 1914 to current year. Published as "at Twin Falls near Iron Mountain, MI", January 1914 to June 1950, October 1996 to September 1998. Records published for both sites July 1950 to September 1957, October 1989 to September 1996, October 1998 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,119.22 ft above NAVD 88, converted on July 9, 2020 from NGVD 29 (levels by Owen Ayres Associates). Prior to July 5, 1950, headwater and tailwater gages and generation data entered hourly in daily log sheets by company employees at the We Energies Twin Falls Powerplant, 10.4 mi downstream. July 5, 1950 to Oct. 19, 2000, water-stage recorder at site 500 ft downstream at same datum.
REMARKS - Prior to July 1950, discharge determined from powerplant records computed on basis of load-discharge rating of hydroelectric units and rating for tailwater gage during periods of spill; ratings developed by U.S. Geological Survey. Flow regulated by powerplants, by Michigamme Reservoir, capacity, 119,950 acre-ft, by Peavy Pond, capacity, 33,860 acre-ft, on Michigamme River, and by many smaller reservoirs upstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 19,500 ft³/s, Apr. 26, 1960, gage height, 14.15 ft; minimum discharge, 38 ft³/s, Aug. 21, 1962, also occurred Sept. 26, 1975.