Homestake Mining Company Evap Pond No.1
Homestake Mining Company Evap Pond No.1 is an earth dam located in Cibola County, New Mexico, built in 1990. It carries a Significant hazard potential classification and has a poor condition assessment.
About Homestake Mining Company Evap Pond No.1
Homestake Mining Company Evap Pond No.1 is a dam in Cibola, New Mexico. The dam is owned by Homestake Mining Company (private). It impounds the San Mateo-os near Grants.
The dam stands 39 feet tall and stretches 4,430 feet across, creates a reservoir covering 26 acres, and has a maximum storage capacity of 314 acre-feet. Completed in 1990, the structure is 36 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 06/25/2015. That was over 10 years ago.
At 39 feet, this dam is taller than 86% of dams nationwide.
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Location
| State | New Mexico |
| County | Cibola |
| Nearest City | Grants |
| River/Stream | San Mateo-os |
| Coordinates | 35.23880, -107.86010 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 4,430 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 314 acre-ft |
| Max Storage | 314 acre-ft |
| Normal Storage | 285 acre-ft |
| Surface Area | 26 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | HOMESTAKE MINING COMPANY |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 06/25/2015 |
| Emergency Action Plan | No |
Identifiers
| NID ID | NM00657 |
| Federal ID | NM00657 |
| More Info | State Dam Safety Program |