Bill Evans Dam
Bill Evans Dam is an earth dam located in Grant County, New Mexico, built in 1969. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Bill Evans Dam
Bill Evans Dam is a dam in Grant, New Mexico. The dam is owned by Freeport Mcmoran Corporation (private). It impounds the Mangas -os near Unincorporated Residents.
The dam stands 170 feet tall and stretches 1,750 feet across, creates a reservoir covering 62 acres, has a maximum storage capacity of 2,375 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1969, the structure is well into its service life at over 50 years 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 06/29/2020.
At 170 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 New Mexico 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 | New Mexico |
| County | Grant |
| Nearest City | Unincorporated Residents |
| River/Stream | Mangas -os |
| Coordinates | 32.86473, -108.57558 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 170 ft |
| Dam Height | 170 ft |
| Dam Length | 1,750 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 2,375 acre-ft |
| Max Storage | 2,375 acre-ft |
| Normal Storage | 2,100 acre-ft |
| Surface Area | 62 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 4,070 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | FREEPORT MCMORAN CORPORATION |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/29/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NM00138 |
| Federal ID | NM00138 |
| More Info | State Dam Safety Program |