O'day #2
O'day #2 is an earth dam located in Cascade County, Montana, built in 1956. It carries a Low hazard potential classification.
About O'day #2
The primary purpose of O'day #2 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 Prairie Nest Ranch (private). It impounds the Rogers Coulee near Fort Benton.
The dam stands 60 feet tall and stretches 600 feet across, and has a maximum storage capacity of 586 acre-feet. Completed in 1956, the structure is well into its service life at over 50 years old.
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 60 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | Montana |
| County | Cascade |
| Nearest City | Fort Benton |
| River/Stream | Rogers Coulee |
| Coordinates | 47.53300, -111.00880 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 60 ft |
| Dam Height | 60 ft |
| Dam Length | 600 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 586 acre-ft |
| Max Storage | 586 acre-ft |
| Normal Storage | 428 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | PRAIRIE NEST RANCH |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01191 |
| Federal ID | MT01191 |
| More Info | State Dam Safety Program |