USGS Water-Year Summary for Site 12334550

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	Available Parameters
	00060 Discharge(Mean)
	80154 Suspnd sedmnt conc(Mean)
	80155 Suspnd sedmnt disch(Mean)

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Water year 2018: 2017-10-01 to 2018-09-30

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USGS Water-Year Summary 2018

12334550 CLARK FORK AT TURAH BRIDGE, NEAR BONNER, MT

LOCATION - Lat 46°49'33.28", long 113°48'50.51" referenced to North American Datum of 1983, in SW 1/4 NW 1/4 SW 1/4 sec.01, T.12 N., R.18 W., Missoula County, MT, Hydrologic Unit 17010202, on left bank 0.8 mi southeast of Turah, 4 mi southeast of Bonner, and at river mile 370.2.

DRAINAGE AREA - 3,657 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1985 to current year. Water-discharge records for the period March 1985 to September 1985 are available in files at the USGS Water Science Center located in Helena, Montana.

GAGE - Water-stage recorder. Elevation of gage is 3,320 ft, referenced to the North American Vertical Datum of 1929 from topographic map. Prior to May 9, 1986, non-recording gage at same site at elevation 2.00 ft higher.

REMARKS -

10-30-2017 to 10-02-2018: records are good, except estimated records are poor.
11-30-2016 to 10-29-2017: records are good, except estimated records are poor.
10-26-2015 to 11-29-2016: records are good, except estimated records are fair.
10-07-2014 to 10-25-2015: records are good, except estimated records are fair.  
02-01-2014 to 10-06-2014: records are good, except estimated records are fair.
10-24-2013 to 01-31-2014: records are good, except estimated records are fair.

Some regulation occurs by the Warm Springs Ponds on Silver Bow Creek near Anaconda and by Georgetown 
Lake (station number 12325000) on Flint Creek. Diversions for irrigation include about 100,000 acres 
upstream from station.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1985 to current year.

PERIOD OF DAILY RECORD -

WATER TEMPERATURE: October 1991 to September 1998.
SUSPENDED-SEDIMENT DISCHARGE: March 1985 to March 2003, August 2003 to current year.

REMARKS -

SUSPENDED SEDIMENT
10-01-2015 to 09-30-2016: records are good.
10-01-2014 to 09-30-2015: records are good.
10-01-2013 to 09-30-2014: records are good.

EXTREMES FOR PERIOD OF DAILY RECORD -

WATER TEMPERATURE: Maximum, 25.0°C, Aug. 17, 1992; minimum, 0.0°C, on many days during winter.
SEDIMENT CONCENTRATION: Maximum daily mean, 1,140 mg/L, Feb. 25, 1986; minimum daily mean, 1 mg/L, 
on many days.
SEDIMENT LOAD: Maximum daily, 24,400 tons, Feb. 25, 1986; minimum daily 0.96 tons, Jan. 13, 2007.

EXTREMES FOR CURRENT YEAR - SEDIMENT CONCENTRATION: Maximum daily mean, 207 mg/L, Feb. 16, 2016; minimum daily mean, 1 mg/L, on several days in Jan., Jun., and Jul. SEDIMENT LOAD: Maximum daily, 810 tons, Feb. 16, 2016; minimum daily, 1.1 tons, Jan. 3, 2016.