R Myhre #1 is an earth dam located in Fallon County, Montana, built in 1945. It carries a Significant hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 400 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 R Myhre #1
The primary purpose of R Myhre #1 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 Rodger Myhre (private). It impounds the Tr-little Beaver Creek near Marmarth North Dakota.
The dam stands 15 feet tall and stretches 400 feet across, has a maximum storage capacity of 138 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1945, 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 | Fallon |
| Nearest City | Marmarth North Dakota |
| River/Stream | Tr-little Beaver Creek |
| Coordinates | 46.16550, -104.25450 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 400 ft |
| Year Completed | 1945 (81 years old) |
Storage & Hydraulics
| NID Storage | 138 acre-ft |
| Max Storage | 138 acre-ft |
| Normal Storage | 54 acre-ft |
| Drainage Area | 3 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Rodger Myhre |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02395 |
| Federal ID | MT02395 |
| More Info | State Dam Safety Program |