Twin (turtle) Dike
Twin (turtle) Dike is an earth dam located in Lake County, Montana, built in 1932. It carries a Undetermined hazard potential classification and has a poor condition assessment.
About Twin (turtle) Dike
The primary purpose of Twin (turtle) Dike is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Bia (federal). It impounds the Twin Feeder Canal.
The dam stands 36 feet tall and stretches 300 feet across, creates a reservoir covering 64 acres, has a maximum storage capacity of 1,130 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1932, the structure is well-established, with more than 75 years of service.
Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 09/24/2020.
At 36 feet, this dam is taller than 83% of dams nationwide.
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Location
| State | Montana |
| County | Lake |
| Nearest City | None |
| River/Stream | Twin Feeder Canal |
| Coordinates | 47.67150, -114.07670 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 34 ft |
| Dam Length | 300 ft |
| Year Completed | 1932 (94 years old) |
Storage & Hydraulics
| NID Storage | 1,130 acre-ft |
| Max Storage | 1,130 acre-ft |
| Normal Storage | 804 acre-ft |
| Surface Area | 64 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Recreation |
| Owner | BIA |
| Owner Type | Federal |
| Hazard Classification | Undetermined |
| Condition Assessment | Poor |
| Last Inspection | 09/24/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MT00597 |
| Federal ID | MT00597S001 |
| More Info | State Dam Safety Program |