USGS Water-Year Summary 2024
04057800 MIDDLE BRANCH ESCANABA RIVER AT HUMBOLDT, MI
LOCATION - Lat 46°29'57", long 87°53'11" referenced to North American Datum of 1927, in SW 1/4 sec.01, T.47 N., R.29 W., Marquette County, MI, Hydrologic Unit 04030110, on left bank 15 ft upstream from county road FX, 1.5 mi downstream from Halfway Creek, and 0.3 mi north of Humboldt.
DRAINAGE AREA - 45.7 mi².
REVISIONS HISTORY - WSP 1911: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - June 1959 to current year.
GAGE - Water-stage recorder and crest-stage gage. V-notch sharp-crested weir since Oct. 3, 1960. Datum of gage is 1,521.38 ft above NAVD 88, converted on July 9, 2020 from NGVD 29 (Cliffs Natural Resources Inc. bench mark). Prior to Sept. 1, 1960, nonrecording gage at same site and datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 1,930 ft³/s, Apr. 20, 1985, gage height, 9.21 ft; minimum discharge, 3.14 ft³/s, Aug. 26, 2021.
WATER-QUALITY RECORDS
PERIOD OF RECORD - June 15, 2023 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: June 16, 2023 to current year. SPECIFIC CONDUCTANCE: June 16, 2023 to current year. pH: June 16, 2023 to current year. DISSOLVED OXYGEN: June 16, 2023 to current year.
INSTRUMENTATION - Water-quality monitor telemeter, set for 15-minute measurement interval.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 25.1 °C, July 31, 2024; minimum, -0.25 °C, March 29, 2024. SPECIFIC CONDUCTANCE: Maximum, 183 microsiemens, May 18, 2024; minimum, 39.7 microsiemens, April 12, 2024. pH: Maximum, 7.3 units, on several days in the 2023 water year; minimum, 5.78 units, May 16, 2024. DISSOLVED OXYGEN: Maximum, 11.7. mg/l, Dec. 27, 2023; minimum, 4.2 mg/l, Sept. 6, 2023.