Four Horns
Four Horns is an earth dam located in Glacier County, Montana, built in 1915. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Four Horns
The primary purpose of Four Horns is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bia (federal). It impounds the Badger Creek-os near Pierce Crossing.
The dam stands 50 feet tall and stretches 1,300 feet across, creates a reservoir covering 1,024 acres, has a maximum storage capacity of 33,724 acre-feet, and collects water from a drainage area of 16 square miles. Completed in 1915, the structure is over a century 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. 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 09/15/2022.
At 50 feet, this dam is taller than 93% of dams nationwide.
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 | Glacier |
| Nearest City | Pierce Crossing |
| River/Stream | Badger Creek-os |
| Coordinates | 48.34420, -112.69660 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 1,300 ft |
| Year Completed | 1915 (111 years old) |
Storage & Hydraulics
| NID Storage | 33,724 acre-ft |
| Max Storage | 33,724 acre-ft |
| Normal Storage | 25,404 acre-ft |
| Surface Area | 1,024 acres |
| Drainage Area | 16 sq mi |
| Max Discharge | 1,376 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | BIA |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/15/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | MT01138 |
| Federal ID | MT01138 |
| More Info | State Dam Safety Program |