Anchor Lake North Dam
Anchor Lake North Dam is a rockfill dam located in Beaverhead County, Montana, built in 1904. It carries a Significant hazard potential classification.
About Anchor Lake North Dam
The primary purpose of Anchor Lake North 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 Beaverhead Water Co (private). It impounds the Tr-birch Creek near Twin Bridges.
The dam stands 12 feet tall, creates a reservoir covering 49 acres, has a maximum storage capacity of 510 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1904, the structure is over a century old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 09/20/1979. That was over 46 years ago.
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Location
| State | Montana |
| County | Beaverhead |
| Nearest City | Twin Bridges |
| River/Stream | Tr-birch Creek |
| Coordinates | 45.43466, -112.99909 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Year Completed | 1904 (122 years old) |
Storage & Hydraulics
| NID Storage | 510 acre-ft |
| Max Storage | 510 acre-ft |
| Normal Storage | 100 acre-ft |
| Surface Area | 49 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 194 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | BEAVERHEAD WATER CO |
| Owner Type | Private |
| Hazard Classification | Significant |
| Last Inspection | 09/20/1979 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01483 |
| Federal ID | MT01483 |
| More Info | State Dam Safety Program |