Big Timber #1
Big Timber #1 is an earth dam located in Rosebud County, Montana, built in 1950. It carries a Low hazard potential classification.
About Big Timber #1
The primary purpose of Big Timber #1 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 Mcgraw Coulee near Forsyth.
The dam stands 15 feet tall and stretches 150 feet across, has a maximum storage capacity of 54 acre-feet, and collects water from a drainage area of 3 square miles. 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 | Rosebud |
| Nearest City | Forsyth |
| River/Stream | Mcgraw Coulee |
| Coordinates | 46.36200, -106.75760 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 150 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 54 acre-ft |
| Max Storage | 54 acre-ft |
| Normal Storage | 28 acre-ft |
| Drainage Area | 3 sq mi |
| Max Discharge | 100 cfs |
| 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 | MT01881 |
| Federal ID | MT01881 |
| More Info | State Dam Safety Program |