Big Timber Sewage Lagoon
Big Timber Sewage Lagoon is an earth dam located in Sweet Grass County, Montana, built in 1959. It carries a Low hazard potential classification.
About Big Timber Sewage Lagoon
Big Timber Sewage Lagoon is a dam in Sweet Grass, Montana. The dam is owned by City Of Big Timber (local government). It impounds the Tr-yellowstone River near Big Timber.
The dam stands 15 feet tall and stretches 3,000 feet across, and has a maximum storage capacity of 270 acre-feet. 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 | Sweet Grass |
| Nearest City | Big Timber |
| River/Stream | Tr-yellowstone River |
| Coordinates | 45.84251, -109.93443 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 3,000 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 270 acre-ft |
| Max Storage | 270 acre-ft |
| Normal Storage | 240 acre-ft |
Ownership & Safety
| Purpose | Other |
| Owner | CITY OF BIG TIMBER |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01415 |
| Federal ID | MT01415 |
| More Info | State Dam Safety Program |