San Juan South Pond 4
San Juan South Pond 4 is an earth dam located in San Juan County, New Mexico, built in 1982. It carries a Significant hazard potential classification and has a poor condition assessment.
About San Juan South Pond 4
San Juan South Pond 4 is a dam in San Juan, New Mexico. The dam is owned by Public Service Company Of New Mexico (public utility). It impounds the San Juan River - Os near Waterflow.
The dam stands 30 feet tall and stretches 3,624 feet across, creates a reservoir covering 14 acres, and has a maximum storage capacity of 258 acre-feet. Completed in 1982, the structure is 44 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 05/08/2019.
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Location
| State | New Mexico |
| County | San Juan |
| Nearest City | Waterflow |
| River/Stream | San Juan River - Os |
| Coordinates | 36.79400, -108.44960 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 3,624 ft |
| Year Completed | 1982 (44 years old) |
Storage & Hydraulics
| NID Storage | 258 acre-ft |
| Max Storage | 258 acre-ft |
| Surface Area | 14 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | PUBLIC SERVICE COMPANY OF NEW MEXICO |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/08/2019 |
| Emergency Action Plan | No |
Identifiers
| NID ID | NM00627 |
| Federal ID | NM00627 |
| More Info | State Dam Safety Program |