Barretts Diversion Dam is a concrete dam located in Beaverhead County, Montana, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 11 ft11 ft tall and 1,720 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Barretts Diversion Dam
The primary purpose of Barretts Diversion Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bureau of Reclamation (federal). It impounds the Beaverhead River near Dillon.
The dam stands 11 feet tall and stretches 1,720 feet across, has a maximum storage capacity of 300 acre-feet, and collects water from a drainage area of 2,737 square miles. Completed in 1963, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. The most recent inspection on record was 10/06/2020.
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Location
| State | Montana |
| County | Beaverhead |
| Nearest City | Dillon |
| River/Stream | Beaverhead River |
| Coordinates | 45.13000, -112.74060 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 1,720 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 300 acre-ft |
| Max Storage | 300 acre-ft |
| Normal Storage | 300 acre-ft |
| Drainage Area | 2,737 sq mi |
| Max Discharge | 2,500 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Bureau of Reclamation |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/06/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT04009 |
| Federal ID | MT04009 |
| More Info | State Dam Safety Program |