Hess is an earth dam located in Fergus County, Montana, built in 1930. It carries a Low hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 350 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 Hess
The primary purpose of Hess 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 Lester Heller (private). It impounds the Tr-missouri River near No Town.
The dam stands 20 feet tall and stretches 350 feet across, and has a maximum storage capacity of 51 acre-feet. Completed in 1930, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Montana |
| County | Fergus |
| Nearest City | No Town |
| River/Stream | Tr-missouri River |
| Coordinates | 47.71590, -109.02150 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 350 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 26 acre-ft |
| Max Discharge | 1,200 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Lester Heller |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00183 |
| Federal ID | MT00183 |
| More Info | State Dam Safety Program |