Weigand Reservoir
Weigand Reservoir is an earth dam located in Blaine County, Montana. It carries a High hazard potential classification.
About Weigand Reservoir
Weigand Reservoir is a dam in Blaine, Montana. The dam is owned by Bia (federal). It impounds the Lone Tree Coulee near Dodson.
The dam stands 13 feet tall and stretches 3,900 feet across, creates a reservoir covering 1,654 acres, has a maximum storage capacity of 21,378 acre-feet, and collects water from a drainage area of 62 square miles.
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. Notably, no emergency action plan is currently on file for this high-hazard dam.
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 | Blaine |
| Nearest City | Dodson |
| River/Stream | Lone Tree Coulee |
| Coordinates | 48.26020, -108.41280 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 3,900 ft |
Storage & Hydraulics
| NID Storage | 21,378 acre-ft |
| Max Storage | 21,378 acre-ft |
| Normal Storage | 4,584 acre-ft |
| Surface Area | 1,654 acres |
| Drainage Area | 62 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Owner | BIA |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Emergency Action Plan | No |
Identifiers
| NID ID | MT00311 |
| Federal ID | MT00311 |
| More Info | State Dam Safety Program |