Over The Hill Reservoir
Over The Hill Reservoir is an earth dam located in Blaine County, Montana, built in 1962. It carries a Low hazard potential classification.
About Over The Hill Reservoir
The primary purpose of Over The Hill Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Westley H Baird (private). It impounds the Tr-thirtymile Creek near Harlem.
The dam stands 20 feet tall and stretches 600 feet across, and has a maximum storage capacity of 338 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.
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Location
| State | Montana |
| County | Blaine |
| Nearest City | Harlem |
| River/Stream | Tr-thirtymile Creek |
| Coordinates | 48.77020, -109.01530 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 600 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 338 acre-ft |
| Max Storage | 338 acre-ft |
| Normal Storage | 208 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | WESTLEY H BAIRD |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01554 |
| Federal ID | MT01554 |
| More Info | State Dam Safety Program |