Mannix
Mannix is an earth dam located in Powell County, Montana, built in 1962. It carries a Low hazard potential classification.
About Mannix
The primary purpose of Mannix is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by F Mannix (private). It impounds the Madison Gulch near Helmville.
The dam stands 30 feet tall and stretches 150 feet across, and has a maximum storage capacity of 53 acre-feet. Completed in 1962, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Montana |
| County | Powell |
| Nearest City | Helmville |
| River/Stream | Madison Gulch |
| Coordinates | 46.81670, -112.70800 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 150 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 53 acre-ft |
| Max Storage | 53 acre-ft |
| Normal Storage | 34 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | F MANNIX |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01388 |
| Federal ID | MT01388 |
| More Info | State Dam Safety Program |