Manley #3
Manley #3 is an earth dam located in Powell County, Montana, built in 1974. It carries a Low hazard potential classification.
About Manley #3
The primary purpose of Manley #3 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by John Manley (private). It impounds the Douglas Creek near Helmville.
The dam stands 15 feet tall and stretches 570 feet across, and has a maximum storage capacity of 145 acre-feet. Completed in 1974, 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 | Helmville |
| River/Stream | Douglas Creek |
| Coordinates | 46.79450, -113.09170 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 570 ft |
| Year Completed | 1974 (52 years old) |
Storage & Hydraulics
| NID Storage | 145 acre-ft |
| Max Storage | 145 acre-ft |
| Normal Storage | 43 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | JOHN MANLEY |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01391 |
| Federal ID | MT01391 |
| More Info | State Dam Safety Program |