USGS Water-Year Summary 2023
06329500 YELLOWSTONE RIVER NEAR SIDNEY, MT
LOCATION - Lat 47°40'38.69", long 104°09'19.48" referenced to North American Datum of 1983, in SW 1/4 NE 1/4 SW 1/4 sec.09, T.22 N., R.59 E., Richland County, MT, Hydrologic Unit 10100004, on left bank at Montana-Dakota Utilities Company powerplant, 0.2 mi downstream from bridge on State Highway 23, 2.5 mi south of Sidney, 3.0 mi downstream from Fox Creek, and at river mile 29.2.
DRAINAGE AREA - 69,099 mi² of which 692 mi² probably is noncontributing. Area at site 4.5 mi upstream. 68,812 mi².
- Water Data Report MT-04-1: Drainage area.
PERIOD OF RECORD - October 1910 to September 1931 (published as "at Intake"), October 1933 to current year. If monthly figures of diversions to Lower Yellowstone Canal at Intake are added to records at this site, records equivalent to those published as Yellowstone River at Glendive (1898-1910, 1931-34) can be obtained. Monthly discharge only for some periods, published in Water Supply Paper (WSP) 1309. Monthly figures of diversions into Lower Yellowstone Canal prior to 1951 published in WSP 1309, 1951-60 published in WSP 1729, 1961-65 published in WSP 1916, 1966-70 published in WSP 2116, and 1971 to current year are published in annual reports.
GAGE - Water-stage recorder. Elevation of gage is 1,881.3 ft, referenced to National Geodetic Vertical Datum of 1929, levels by U.S. Army Corps of Engineers. Jan. 1, 1911, to Sept. 30, 1931, nonrecording gage at site 32 miles upstream at different elevation. Apr. 9, 1934, water-stage recorder at two sites within 500 ft of highway bridge 0.2 mi upstream and May 17, 1945, to Apr. 3, 1952, nonrecording gage on same bridge at elevation 1.36 ft higher. Apr. 4, 1952, to Nov. 19, 1967, water-stage recorder at site 4.5 mi upstream at different elevation. U.S. Army Corps of Engineers satellite telemeter is located at the station.
PERIOD OF RECORD - Water years 1948 to current year.
PERIOD OF DAILY RECORD
SPECIFIC CONDUCTANCE: October 1964 to September 1981.
WATER TEMPERATURE: January 1951 to September 1985, May 2016 to current year (seasonal record).
SUSPENDED-SEDIMENT DISCHARGE: October 1971 to September 1981, October 1982 to September 1991,
seasonal records (March (or ice breakup) through November) from October 1991 to current year.
EXTREMES FOR PERIOD OF DAILY RECORD
SPECIFIC CONDUCTANCE: Maximum daily, 1,220 microsiemens per centimeter (uS/cm) at 25.0°C, Apr. 6,
1979; minimum daily, 261 uS/cm at 25.0°C, June 4, 1966.
WATER TEMPERATURE: Maximum, 29.0°C July 23, 1960; minimum, 0.0°C on many days during winter.
SEDIMENT CONCENTRATION: Maximum daily mean, 26,800 mg/L May 8, 1975; minimum daily mean, 8 mg/L
Jan. 9, 1973.
SEDIMENT LOAD: Maximum daily, 3,030,000 tons May 8, 1975; minimum daily, 63 tons Jan. 2, 1989.
EXTREMES FOR CURRENT YEAR - SEDIMENT CONCENTRATION: During period of seasonal operation, maximum daily mean, 2,370 mg/L, June 8; minimum daily mean, 23 mg/L, Nov. 8 and Sep. 25-29.
SEDIMENT LOAD: During period of seasonal operation, maximum daily, 233,000 tons, June 8-9; minimum daily, 136 tons, Sep. 3.