Eliasson (petroleum)
Eliasson (petroleum) is an earth dam located in Petroleum County, Montana, built in 1939. It carries a Low hazard potential classification.
About Eliasson (petroleum)
The primary purpose of Eliasson (petroleum) 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 Flatwillow Colony Ranch (private). It impounds the Tr-little Wall Creek near Mosby.
The dam stands 19 feet tall and stretches 545 feet across, creates a reservoir covering 35 acres, has a maximum storage capacity of 200 acre-feet, and collects water from a drainage area of 38 square miles. Completed in 1939, 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 | Petroleum |
| Nearest City | Mosby |
| River/Stream | Tr-little Wall Creek |
| Coordinates | 46.75710, -108.49020 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 545 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 400 acre-ft |
| Max Storage | 200 acre-ft |
| Normal Storage | 400 acre-ft |
| Surface Area | 35 acres |
| Drainage Area | 38 sq mi |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | FLATWILLOW COLONY RANCH |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01055 |
| Federal ID | MT01055 |
| More Info | State Dam Safety Program |