Arrambide Detention Dam X
Arrambide Detention Dam X is a gravity dam located in Valley County, Montana, built in 1957. It carries a Low hazard potential classification and has a fair condition assessment.
About Arrambide Detention Dam X
The primary purpose of Arrambide Detention Dam X is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Doi Blm (federal). It impounds the Willow Ck./milk River near Nashua.
The dam stands 17 feet tall and stretches 1,367 feet across, creates a reservoir covering 136 acres, has a maximum storage capacity of 970 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1957, 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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 12/02/2019.
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Location
| State | Montana |
| County | Valley |
| Nearest City | Nashua |
| River/Stream | Willow Ck./milk River |
| Coordinates | 48.04279, -107.00982 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 17 ft |
| Dam Length | 1,367 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 970 acre-ft |
| Max Storage | 970 acre-ft |
| Normal Storage | 517 acre-ft |
| Surface Area | 136 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | DOI BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 12/02/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00684 |
| Federal ID | MT00684 |
| More Info | State Dam Safety Program |