Barretts Diversion Dam

Overview
Barretts Diversion Dam is a concrete, gated structure with embankment wings on the Beaverhead River 8 miles southwest of Dillon, Mont. The spillway capacity is 2,500 cubic feet per second, controlled by one 24- by 10-foot radial gate. The sluiceway is controlled by one 8- by 10-foot radial gate. The headworks capacity of East Bench Canal is 440 cubic feet per second, controlled by two 10- by 8-foot radial gates. The Canyon Canal headworks capacity is 200 cubic feet per second, controlled by one 10- by 8-foot radial gate. One 24-inch-diameter slide gate and one 36- by 30-inch slide gate, in series, control the discharge of water into the existing Rebich Ditch, which has a capacity of 12 cubic feet per second. A fish excluder is upstream of the canal headworks.

General
RegionFacilities in Great Plains | Great Plains Home Page
StateMontana
CountyBeaverhead
ProjectEast Bench Unit, Pick-Sloan Missouri Basin Program
Dam TypeConcrete gate structure with embankment wings
Reservoir
WatercourseBeaverhead River
LocationOn Beaverhead River about 11 miles downstream from Clark Canyon Dam.
Longitude-112.7403
Latitude45.1302
Original Construction1963
Modified Construction
National ID NumberMT82919
Hydrologic Unit Code

Dimensions
Structural Height11.00 ft
Hydraulic Height (Normal Operating Depth at Dam)10.00 ft
Top Parapet (Elevation)
Spillway Crest Elevation
Crest Elevation5,255.00 ft
Crest Length1,720.00 ft
Crest Width
Base Width
Volume of Dam Construction Materials1,390.00 cu yds
Streambed at Dam Axis
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)
Top of Inactive Conservation Pool (Elevation)
Top of Dead Storage Pool (Elevation)

Hydraulics & Hydrology
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation
Spillway TypeOne 24- by 10- ft radial gate.
Auxiliary Spillway
Spillway Capacity at Elevation2,500.00 cfs at 5,255.00 ft
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation
Diversion Capacity at Elevation
Drainage Area
Hydrometeorological Report (HMR)
Probable Maximum Flood (PMF) Report

Contact Information
Owner
TitleArea Manager
OrganizationMontana Area Office
AddressP.O. Box 30137
CityBillings, MT 59107-0137
Phone (Fax)406 247-7338
Phone (Office)406 247-7300
Operator
TitleArea Manager
OrganizationMontana Area Office
AddressP.O. Box 30137
CityBillings, MT 59107-0137
Phone (Fax)406 247-7338
Phone (Office)406 247-7300


Last updated: Mar 29, 2013