Mountain Home
Mountain Home is a dam located in Elmore County, Idaho, built in 1884. It carries a High hazard potential classification and has a fair condition assessment.
About Mountain Home
Mountain Home is a dam in Elmore, Idaho. The dam is private-owned. It impounds the Rattlesnake Creek Canyon Creek near Mountain Home.
The dam stands 48 feet tall and stretches 3,700 feet across, creates a reservoir covering 406 acres, has a storage capacity of 5,468 acre-feet, and collects water from a drainage area of 37 square miles. Completed in 1884, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 06/04/2019.
At 48 feet, this dam is taller than 92% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Idaho dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Idaho |
| County | Elmore |
| Nearest City | Mountain Home |
| River/Stream | Rattlesnake Creek Canyon Creek |
| Coordinates | 43.15710, -115.66240 |
Physical Characteristics
| NID Height | 48 ft |
| Dam Height | 48 ft |
| Dam Length | 3,700 ft |
| Year Completed | 1884 (142 years old) |
Storage & Hydraulics
| NID Storage | 5,468 acre-ft |
| Normal Storage | 5,468 acre-ft |
| Surface Area | 406 acres |
| Drainage Area | 37 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 06/04/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ID00238 |
| Federal ID | ID00238 |
| More Info | State Dam Safety Program |