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Missoula Valley Project
Missoula Valley Project | Project History | Project Data | Contact Information

Project Data
Land Areas (1992)
Area Irrigated and Crop Value

 

  

Project # 342

Land Areas (1992)
Irrigable area:
Full Irrigation Service155 acres
Supplemental Service0 acres
Temporary Irrigation Service0 acres
Number of Irrigated Farms3
Residential, Commercial, Industrial Lands625 acres
Total Irrigable Lands780 acres

 

Population Served:
Farm Population Served10
Non-Farm Population Served2,187
Total Population Served2,197

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Area Irrigated and Crop Value
YearActual Area Irrigated (Acres)Crop Value (Dollars)
198315032,200
198415029,400
198515029,400
198621,57525,
198715025,575
198815027,175
198915032,000
199015031,750
199115031,750
199215031.750

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Project Water Supply
Project Water Quality

 

   

Project Water Supply

Current Conditions


Streamflow

Clark Fork above Missoula, Montana (USGS)

Streamflow Forecast Map

Spring and Summer (NRCS)

Snowpack Information

Columbia River Snowpack Summary
Mountain Snowpack Maps for Columbia River Basin
Drought Index

Palmer Drought Index Map
Explanation of Palmer Drought Severity Index (Text)
Historic Conditions

Annual Precipitation
Normal13.5 in
Maximum - 198019.4 in
Minimum - 19739.0 in
Missoula,Montana 1961-1990 

 

Temperature
Mean Annual44 ?F
Daily Maximum - 1953105 ?F
Daily Minimum - 1957-33 ?F
Missoula, Montana 1948-1996 
Growing Season142 days
Elevation on irrigable area3,100.0 ft

 

Bitterroot River
Drainage area above diversion point2,814 mi2
Annual discharge 
Maximum - 18993,582,147 acre-ft
Minimum - 1992980,593 acre-ft
Average - 1898-19961,724,196 acre-ft

 

Streamflows:

Bitterroot River near Missoula, Montana (USGS)

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Project Water Quality

Middle Clark Fork

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Facilities in Operation
Diversion Facilities
Carriage Facilities

 

   

Facilities in Operation
Canals9 mi
Laterals2 mi

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Diversion Facilities

Big Flat Canal Headworks

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Carriage Facilities
LocationFrom intake on Bitterroot River about 5 miles southwest of Missoula, Montana, generally northwest along west side of Bitterroot and Clark Fork Rivers.
Construction period1945-1949
Length9.3 mi
Diversion capacity25 cfs
Typical section in earth: 
Bottom width5 ft
Side slopes1.5:1
Water depth2.2 ft
Typical section, concrete bench flume: 
Bottom width4 ft
Side slopes0:1
Water depth2.2 ft
Lining thickness5 in

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Last updated: May 11, 2011