Bureau of Reclamation Banner
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

Return to top

Area Irrigated and Crop Value
YearActual Area Irrigated (Acres)Crop Value (Dollars)

Return to top

Project Water Supply
Project Water Quality



Project Water Supply

Current Conditions


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 


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



Bitterroot River near Missoula, Montana (USGS)

Return to top

Project Water Quality

Middle Clark Fork

Return to top

Facilities in Operation
Diversion Facilities
Carriage Facilities



Facilities in Operation
Canals9 mi
Laterals2 mi

Return to top

Diversion Facilities

Big Flat Canal Headworks

Return to top

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

Return to top

Last updated: May 11, 2011