Averill is an earth dam located in Flathead County, Montana, built in 1964. It carries a Low hazard potential classification.
Dam profile
NID height · 32 ft32 ft tall and 225 ft long, taller than 74% 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 Averill
The primary purpose of Averill is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Ashley Irrigation District (local government). It impounds the Tr-little Bitterroot River.
The dam stands 32 feet tall and stretches 225 feet across, has a maximum storage capacity of 214 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1964, 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 | Flathead |
| Nearest City | None |
| River/Stream | Tr-little Bitterroot River |
| Coordinates | 48.01115, -114.81518 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Height | 32 ft |
| Dam Length | 225 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 214 acre-ft |
| Max Storage | 214 acre-ft |
| Normal Storage | 135 acre-ft |
| Drainage Area | 2 sq mi |
| Max Discharge | 63 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Ashley Irrigation District |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01165 |
| Federal ID | MT01165 |
| More Info | State Dam Safety Program |