East Fork
East Fork is an earth dam located in Hill County, Montana, built in 2007. It carries a High hazard potential classification and has a satisfactory condition assessment.
About East Fork
The primary purpose of East Fork 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 East Fork Beaver Creek near Havre.
The dam stands 76 feet tall and stretches 340 feet across, creates a reservoir covering 32 acres, has a maximum storage capacity of 913 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 2007, the structure is relatively new.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 07/27/2023.
At 76 feet, this dam is taller than 97% 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 | Hill |
| Nearest City | Havre |
| River/Stream | East Fork Beaver Creek |
| Coordinates | 48.17490, -109.63830 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 76 ft |
| Dam Height | 76 ft |
| Dam Length | 340 ft |
| Year Completed | 2007 (19 years old) |
Storage & Hydraulics
| NID Storage | 913 acre-ft |
| Max Storage | 913 acre-ft |
| Normal Storage | 667 acre-ft |
| Surface Area | 32 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 2,610 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | BIA |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 07/27/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MT01335 |
| Federal ID | MT01335 |
| More Info | State Dam Safety Program |