Tonn #2
Tonn #2 is an earth dam located in Custer County, Montana, built in 1960. It carries a Low hazard potential classification.
About Tonn #2
The primary purpose of Tonn #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 Tonn Brothers (private). It impounds the Tr-jack Creek near Miles City.
The dam stands 15 feet tall and stretches 300 feet across, and has a maximum storage capacity of 51 acre-feet. Completed in 1960, 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.
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Location
| State | Montana |
| County | Custer |
| Nearest City | Miles City |
| River/Stream | Tr-jack Creek |
| Coordinates | 46.15920, -105.60280 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 300 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 51 acre-ft |
| Max Storage | 51 acre-ft |
| Normal Storage | 19 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 | MT01655 |
| Federal ID | MT01655 |
| More Info | State Dam Safety Program |