Rock Creek Lake Dam is an earth dam located in Powell County, Montana, built in 1900. It carries a Low hazard potential classification.
Dam profile
NID height · 25 ft25 ft tall and 200 ft long, taller than 50% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Rock Creek Lake Dam
The primary purpose of Rock Creek Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Franklin Inc. (private). It impounds the Tr-rock Creek near Garrison.
The dam stands 25 feet tall and stretches 200 feet across, and has a maximum storage capacity of 32 acre-feet. Completed in 1900, the structure is over a century 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 | Powell |
| Nearest City | Garrison |
| River/Stream | Tr-rock Creek |
| Coordinates | 46.46510, -112.86060 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 200 ft |
| Year Completed | 1900 (126 years old) |
Storage & Hydraulics
| NID Storage | 32 acre-ft |
| Max Storage | 32 acre-ft |
| Normal Storage | 16 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Franklin Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03292 |
| Federal ID | MT03292 |
| More Info | State Dam Safety Program |