Tiber Dike
Tiber Dike is an earth dam located in Liberty County, Montana, built in 1956. It carries a High hazard potential classification.
About Tiber Dike
Tiber Dike is a dam in Liberty, Montana. The dam is owned by Bureau Of Reclamation (federal). It impounds the Marias River Offstream near Loma.
The dam stands 65 feet tall and stretches 16,650 feet across, creates a reservoir covering 23,805 acres, has a maximum storage capacity of 1,424,478 acre-feet, and collects water from a drainage area of 4,393 square miles. Completed in 1956, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 07/28/2021.
At 65 feet, this dam is taller than 96% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Montana dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Montana |
| County | Liberty |
| Nearest City | Loma |
| River/Stream | Marias River Offstream |
| Coordinates | 48.30120, -111.12570 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 65 ft |
| Dam Height | 48 ft |
| Dam Length | 16,650 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 1,424,478 acre-ft |
| Max Storage | 1,424,478 acre-ft |
| Normal Storage | 967,320 acre-ft |
| Surface Area | 23,805 acres |
| Drainage Area | 4,393 sq mi |
| Spillway Type | None |
Ownership & Safety
| Owner | BUREAU OF RECLAMATION |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 07/28/2021 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MT00579 |
| Federal ID | MT00579S001 |
| More Info | State Dam Safety Program |