Rosann Rosanna Dana is an earth dam located in Sweet Grass County, Montana, built in 1939. It carries a Low hazard potential classification.
Dam profile
NID height · 50 ft50 ft tall and 200 ft long, taller than 92% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About Rosann Rosanna Dana
Rosann Rosanna Dana is a dam in Sweet Grass, Montana. The dam is owned by Robert a Campanella (private). It impounds the Tr-countryman Creek near Columbus.
The dam stands 50 feet tall and stretches 200 feet across, and has a maximum storage capacity of 107 acre-feet. 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.
At 50 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Montana |
| County | Sweet Grass |
| Nearest City | Columbus |
| River/Stream | Tr-countryman Creek |
| Coordinates | 45.61271, -109.59960 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 200 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 107 acre-ft |
| Max Storage | 107 acre-ft |
| Normal Storage | 73 acre-ft |
Ownership & Safety
| Purpose | Other |
| Owner | Robert a Campanella |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01430 |
| Federal ID | MT01430 |
| More Info | State Dam Safety Program |