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Water-Year Summary for Site 06109500

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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
00060 Discharge(Mean)  

Water year 2022: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2022
LOCATION - Lat 48°00'13.62", long 110°15'31.76" referenced to North American Datum of 1983, in SW 1/4 SW 1/4 SE 1/4 sec.13, T.26 N., R.11 E., Chouteau County, MT, Hydrologic Unit 10040101, on left bank 0.2 mi upstream from Virgelle ferry, 0.6 mi southwest of Virgelle, 1.8 mi downstream from Spring Coulee, and at river mile 2,034.2.
DRAINAGE AREA - 34,000 mi² of which 671 mi² probably is noncontributing.  
REVISIONS HISTORY - WSP 1729: Drainage area. WDR MT-2013: Drainage area.
PERIOD OF RECORD - February 1935 to current year. Prior to October 1953, published as "at Loma."
GAGE - Water-stage recorder. Elevation of gage is 2,507.50 ft, referenced to the National Geodetic Vertical Datum of 1929. Prior to Sept. 30, 1953, water-stage recorder at Loma, 18 mi upstream, 2,543.40 ft.
REMARKS - Flow is regulated by 23 smaller irrigation reservoirs and powerplants, Clark Canyon Reservoir (station number 06015300), Canyon Ferry Lake (station number 06058500), and Lake Elwell (station number 06101300). Numerous diversions for irrigation occur upstream from station.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in June 1908 reached a stage about 2 ft higher than that of June 5, 1953, from information by local residents.
EXTREMES FOR PERIOD OF RECORD - Maximum peak flow from rating curve extended above 66,000 ft³/s for former site at Loma. Maximum peak stage was from flood mark.