Ruins Detention Dam
Ruins Detention Dam is a gravity dam located in Valley County, Montana, built in 1965. It carries a Low hazard potential classification and has a poor condition assessment.
About Ruins Detention Dam
The primary purpose of Ruins Detention Dam 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 35 feet tall and stretches 536 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 201 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1965, 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 11/02/2019.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | Montana |
| County | Valley |
| Nearest City | Nashua |
| River/Stream | Willow Ck./milk River |
| Coordinates | 47.94031, -107.22492 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 35 ft |
| Dam Length | 536 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 201 acre-ft |
| Max Storage | 201 acre-ft |
| Surface Area | 17 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 | Poor |
| Last Inspection | 11/02/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00752 |
| Federal ID | MT00752 |
| More Info | State Dam Safety Program |