Conleys Lake (powell) is an earth dam located in Powell County, Montana, built in 1958. It carries a Low hazard potential classification.
Dam profile
NID height · 11 ft11 ft tall and 800 ft long. 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 Conleys Lake (powell)
The primary purpose of Conleys Lake (powell) is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by State of Montana, D.o.c. (state). It impounds the Tr-tin Cup Joe Creek near Deer Lodge.
The dam stands 11 feet tall and stretches 800 feet across, creates a reservoir covering 13 acres, and has a maximum storage capacity of 81 acre-feet. Completed in 1958, 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 | Powell |
| Nearest City | Deer Lodge |
| River/Stream | Tr-tin Cup Joe Creek |
| Coordinates | 46.38530, -112.85000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 800 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 81 acre-ft |
| Max Storage | 81 acre-ft |
| Normal Storage | 81 acre-ft |
| Surface Area | 13 acres |
Ownership & Safety
| Purpose | Irrigation |
| Owner | State of Montana, D.o.c. |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01383 |
| Federal ID | MT01383 |
| More Info | State Dam Safety Program |