Dog Creek Reservoir is an earth dam located in Powell County, Montana, built in 1954. It carries a Significant hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 550 ft long, taller than 76% 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 Dog Creek Reservoir
The primary purpose of Dog Creek Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Mcgraw, Michael (private). It impounds the Spotted Dog Creek near Avon.
The dam stands 33 feet tall and stretches 550 feet across, creates a reservoir covering 18 acres, and has a maximum storage capacity of 176 acre-feet. Completed in 1954, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Montana |
| County | Powell |
| Nearest City | Avon |
| River/Stream | Spotted Dog Creek |
| Coordinates | 46.52850, -112.57930 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 550 ft |
| Year Completed | 1954 (72 years old) |
Storage & Hydraulics
| NID Storage | 176 acre-ft |
| Max Storage | 176 acre-ft |
| Normal Storage | 176 acre-ft |
| Surface Area | 18 acres |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Mcgraw, Michael |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01381 |
| Federal ID | MT01381 |
| More Info | State Dam Safety Program |