South Fork Detention Dam
South Fork Detention Dam is a gravity dam located in Prairie County, Montana, built in 1964. It carries a Low hazard potential classification and has a poor condition assessment.
About South Fork Detention Dam
The primary purpose of South Fork 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 Cherry Ck./yellowstone River near Glendive.
The dam stands 28 feet tall and stretches 730 feet across, creates a reservoir covering 41 acres, and has a maximum storage capacity of 520 acre-feet. Completed in 1964, 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 07/24/2020.
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Location
| State | Montana |
| County | Prairie |
| Nearest City | Glendive |
| River/Stream | Cherry Ck./yellowstone River |
| Coordinates | 46.88331, -105.67106 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 28 ft |
| Dam Length | 730 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 520 acre-ft |
| Max Storage | 520 acre-ft |
| Surface Area | 41 acres |
| 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 | 07/24/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00660 |
| Federal ID | MT00660 |
| More Info | State Dam Safety Program |