Big Timber #20
Big Timber #20 is an earth dam located in Rosebud County, Montana, built in 1959. It carries a Low hazard potential classification.
About Big Timber #20
The primary purpose of Big Timber #20 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 Big Timber Livestock Co (private). It impounds the Tr-west Blacktail Creek near Forsyth.
The dam stands 20 feet tall and stretches 200 feet across, has a maximum storage capacity of 82 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1959, 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 | Rosebud |
| Nearest City | Forsyth |
| River/Stream | Tr-west Blacktail Creek |
| Coordinates | 46.61930, -107.27470 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 200 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 82 acre-ft |
| Max Storage | 82 acre-ft |
| Normal Storage | 50 acre-ft |
| Drainage Area | 2 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | BIG TIMBER LIVESTOCK CO |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01906 |
| Federal ID | MT01906 |
| More Info | State Dam Safety Program |