Overview
Barretts Diversion Dam is a concrete, gated structure with embankment wings on the Beaverhead River 8 miles southwest of Dillon, Montana. 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
| Project | East Bench Unit, Pick-Sloan Missouri Basin Program |
| Dam Type | Concrete gate structure with embankment wings |
| Location | On Beaverhead River about 11 miles downstream from Clark Canyon Dam. |
| Longitude | -112.7403 |
| Watercourse | Beaverhead River |
| Original Construction | 1963 |
| National ID Number | MT82919 |
| Latitude | 45.1302 |
Dimensions
| Hydraulic Height (Normal Operating Depth at Dam) | 10.00 ft |
| Crest Length | 1,720.00 ft |
| Volume of Dam Construction Materials | 1,390.00 cu yds |
| Crest Elevation | 5,255.00 ft |
| Structural Height | 11.00 ft |
Hydraulics & Hydrology
| Spillway Type | One 24- by 10- ft radial gate. |
| Spillway Capacity at Elevation | 2,500.00 cfs at 5,255.00 ft |
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