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Water-Year Summary for Site 06329500
10-01-2019 to 09-30-2020: records are good, except estimated records, which are poor. 10-01-2018 to 09-30-2019: records are good, except estimated records, which are poor. 10-01-2017 to 09-30-2018: records are good, except estimated records, which are poor. 10-01-2016 to 09-30-2017: records are good, except estimated records, which are poor. 10-01-2015 to 09-30-2016: records are good, except estimated records, which are poor. 10-01-2014 to 09-30-2015: records are good, except estimated records, which are poor. 10-01-2013 to 09-30-2014: records are good, except estimated records, which are poor. Flow is regulated to some extent by Bighorn Lake, usable capacity, 1,312,000 acre-ft, on the Bighorn River and on other tributary streams in Wyoming and Montana. Diversion for irrigation of about 1,250,000 acres occurs upstream from station. Lower Yellowstone Project Main Canal diverts from left bank in NW1/4 sec.36, T.18 N., R.56 E., at Lower Yellowstone diversion dam at Intake about 36.6 mi upstream for irrigation of about 52,000 acres of which about one-third lies upstream from station.
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.
WATER TEMPERATURE (seasonal record):Records no longer rated
04-19-2018 to 10-31-2018: records are excellent. 04-04-2017 to 10-31-2017: records are excellent. 08-07-2016 to 08-21-2016, 09-04-2016 to 09-05-2016: records are fair. 05-09-2016 TO 08-06-2016, 08-22-2016 to 09-03-2016, 09-06-2016 to 09-30-2016: records are excellent. SUSPENDED SEDIMENT: Daily sediment records are rated good except for several periods of storm runoff, which are rated fair to poor. Daily sediment data collected seasonally (October 2011 through November 2011 and April 2012 through September 2012) during open water. Hydrologic events during summer months, when sampling frequency is reduced, were not sampled at an ideal frequency. All sample results were used in the construction of the sediment concentration curve. Suspended and bed sediment samples plus the seasonal daily sediment record were obtained as part of the Corps of Engineers program.
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.