Tonn #4
Tonn #4 is an earth dam located in Custer County, Montana, built in 1950. It carries a Low hazard potential classification.
About Tonn #4
The primary purpose of Tonn #4 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 Tonn Brothers (private). It impounds the Deer Creek near Miles City.
The dam stands 20 feet tall and stretches 462 feet across, and has a maximum storage capacity of 65 acre-feet. Completed in 1950, 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 | Custer |
| Nearest City | Miles City |
| River/Stream | Deer Creek |
| Coordinates | 46.00300, -105.47740 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 462 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 65 acre-ft |
| Max Storage | 65 acre-ft |
| Normal Storage | 50 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | TONN BROTHERS |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01206 |
| Federal ID | MT01206 |
| More Info | State Dam Safety Program |