U N Reservoir
U N Reservoir is an earth dam located in Hill County, Montana, built in 1940. It carries a Low hazard potential classification.
About U N Reservoir
The primary purpose of U N Reservoir 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 Margret L Smith (private). It impounds the Marietta Coulee near No Town.
The dam stands 20 feet tall and stretches 1,100 feet across, and has a maximum storage capacity of 124 acre-feet. Completed in 1940, 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 | Hill |
| Nearest City | No Town |
| River/Stream | Marietta Coulee |
| Coordinates | 48.89820, -109.92420 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 1,100 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 124 acre-ft |
| Max Storage | 124 acre-ft |
| Normal Storage | 100 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | MARGRET L SMITH |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00290 |
| Federal ID | MT00290 |
| More Info | State Dam Safety Program |