Mountain Home
Mountain Home is an earth dam located in Costilla County, Colorado, built in 1908. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Mountain Home
The primary purpose of Mountain Home is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Tracy Kester, (private). It impounds the Trinchera Creek near Arroya Hondo, Nm.
The dam stands 153 feet tall and stretches 490 feet across, creates a reservoir covering 597 acres, has a maximum storage capacity of 26,230 acre-feet, and collects water from a drainage area of 70 square miles. Completed in 1908, 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 06/23/2022.
At 153 feet, this dam is taller than 99% of all dams in the United States.
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 Colorado 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 | Colorado |
| County | Costilla |
| Nearest City | Arroya Hondo, Nm |
| River/Stream | Trinchera Creek |
| Coordinates | 37.39341, -105.39396 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 153 ft |
| Dam Height | 127 ft |
| Dam Length | 490 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 26,230 acre-ft |
| Max Storage | 26,230 acre-ft |
| Normal Storage | 17,964 acre-ft |
| Surface Area | 597 acres |
| Drainage Area | 70 sq mi |
| Max Discharge | 17,600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | TRACY KESTER, |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/23/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CO00818 |
| Federal ID | CO00818 |
| More Info | State Dam Safety Program |