Blanchard Detention Dam X
Blanchard Detention Dam X is a gravity dam located in Valley County, Montana, built in 1960. It carries a Low hazard potential classification and has a unsatisfactory condition assessment.
About Blanchard Detention Dam X
The primary purpose of Blanchard 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 24 feet tall and stretches 1,377 feet across, creates a reservoir covering 59 acres, has a maximum storage capacity of 631 acre-feet, and collects water from a drainage area of 24 square miles. Completed in 1960, 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 unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. The most recent inspection on record was 11/01/2019.
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Location
| State | Montana |
| County | Valley |
| Nearest City | Nashua |
| River/Stream | Willow Ck./milk River |
| Coordinates | 48.04691, -106.71589 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 24 ft |
| Dam Length | 1,377 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 631 acre-ft |
| Max Storage | 631 acre-ft |
| Normal Storage | 104 acre-ft |
| Surface Area | 59 acres |
| Drainage Area | 24 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 | Unsatisfactory |
| Last Inspection | 11/01/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00668 |
| Federal ID | MT00668 |
| More Info | State Dam Safety Program |