Blanco Reservoir Dam
Blanco Reservoir Dam is an earth dam located in San Juan County, New Mexico, built in 1957. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Blanco Reservoir Dam
Blanco Reservoir Dam is a dam in San Juan, New Mexico. The dam is owned by Enterprise Field Services, Llc (private). It impounds the San Juan River - Os near Bloomfield.
The dam stands 43 feet tall and stretches 380 feet across, creates a reservoir covering 11 acres, has a maximum storage capacity of 198 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1957, 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 12/03/2019.
At 43 feet, this dam is taller than 89% 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 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 | San Juan |
| Nearest City | Bloomfield |
| River/Stream | San Juan River - Os |
| Coordinates | 36.71831, -107.92240 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 43 ft |
| Dam Height | 43 ft |
| Dam Length | 380 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 198 acre-ft |
| Max Storage | 198 acre-ft |
| Normal Storage | 162 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 314 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | ENTERPRISE FIELD SERVICES, LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/03/2019 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NM00574 |
| Federal ID | NM00574 |
| More Info | State Dam Safety Program |