Judy Detention Dam
Judy Detention Dam is a gravity dam located in Valley County, Montana, built in 1960. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Judy Detention Dam
The primary purpose of Judy 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 22 feet tall and stretches 1,037 feet across, creates a reservoir covering 65 acres, has a maximum storage capacity of 803 acre-feet, and collects water from a drainage area of 0 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 11/13/2019.
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Location
| State | Montana |
| County | Valley |
| Nearest City | Nashua |
| River/Stream | Willow Ck./milk River |
| Coordinates | 48.08206, -106.82128 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 22 ft |
| Dam Length | 1,037 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 803 acre-ft |
| Max Storage | 803 acre-ft |
| Normal Storage | 472 acre-ft |
| Surface Area | 65 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 | Satisfactory |
| Last Inspection | 11/13/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00706 |
| Federal ID | MT00706 |
| More Info | State Dam Safety Program |