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Water-Year Summary for Site 12334510

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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
00010 Temperature, water(Max.,Min.,Mean)  
00060 Discharge(Mean)  

Water year 2020: 2020-10-01 to 2021-09-30
 

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USGS Water-Year Summary 2020
12334510 ROCK CREEK NEAR CLINTON, MT
LOCATION - Lat 46°43'20.41", long 113°40'59.02" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 SW 1/4 sec.12, T.11 N., R.17 W., Missoula County, MT, Hydrologic Unit 17010202, on left bank 100 ft downstream from private road bridge, 0.2 mi upstream from mouth, and 3.7 mi southeast of Clinton.
DRAINAGE AREA - 889 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1972 to current year.
GAGE - Water-stage recorder. Elevation of gage is 3,519.46 ft, referenced to the National Geodetic Vertical Datum of 1929.
REMARKS -
10-01-2018 to 10-02-2019: records are good, except estimated records are poor.
10-30-2017 to 09-30-2018: records are good, except estimated records are poor.
11-29-2016 to 10-29-2017: records are good, except estimated records are poor.
10-26-2015 to 11-28-2016: records are fair, except estimated records are poor.
10-06-2014 to 10-25-2015: records are fair, except estimated records are poor.
10-21-2013 to 10-05-2014: records are fair, except estimated records are poor.

Some regulation occurs by East Fork Rock Creek Reservoir (station number 12332500). During irrigation
season water is diverted from East Fork Rock Creek in sec.5, T.4 N., R.14 W., 500 ft below Rock Creek
Dam, through a canal into Trout Creek, thence into Flint Creek. Diversions occur for irrigation of
about 16,100 acres.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in June 1972 reached a stage of 8.52 ft, from floodmark, discharge, 6,500 ft³/s; local residents report flood of 1927 reached a stage of about 9.5 ft.
EXTREMES FOR PERIOD OF RECORD - Instantaneous low flow may have been leass during period of ice affect.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD -
WATER TEMPERATURE: September 1979 to September 1983, April 1995 to September 2002, (seasonal record) 
October 2004 to current year.
INSTRUMENTATION - Water temperature probe was installed in April 1995.
REMARKS -
WATER TEMPERATURE
03/01/2019 to 10/31/2019 (seasonal record): records are excellent.
03/01/2018 to 10/01/2018 (seasonal record): records are excellent.
02/28/2017 to 10/30/2017 (seasonal record): records are excellent.
03/03/2016 to 10/05/2016 (seasonal record): records are excellent.
02/19/2015 to 10/26/2015 (seasonal record): records are excellent. 
04/01/2014 to 09/30/2014 (seasonal record): records are excellent. 
EXTREMES FOR PERIOD OF DAILY RECORD -
WATER TEMPERATURE: Maximum, 23.0°C, Aug. 1, 2000; minimum, 0.0°C, on many days during winter periods.