Hellinger is an earth dam located in Toole County, Montana, built in 1935. It carries a Significant hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 525 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Hellinger
The primary purpose of Hellinger is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Hellinger Bros (private). It impounds the Willow Creek near Devon.
The dam stands 10 feet tall and stretches 525 feet across, and has a maximum storage capacity of 30 acre-feet. Completed in 1935, the structure is well-established, with more than 75 years of service.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
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Location
| State | Montana |
| County | Toole |
| Nearest City | Devon |
| River/Stream | Willow Creek |
| Coordinates | 48.53360, -111.47230 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 525 ft |
| Year Completed | 1935 (91 years old) |
Storage & Hydraulics
| NID Storage | 30 acre-ft |
| Max Storage | 30 acre-ft |
| Normal Storage | 18 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Hellinger Bros |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00399 |
| Federal ID | MT00399 |
| More Info | State Dam Safety Program |