Palo Verde Evaporation Pond No. 3
Palo Verde Evaporation Pond No. 3 is an earth dam located in Maricopa County, Arizona, built in 2009. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Palo Verde Evaporation Pond No. 3
Palo Verde Evaporation Pond No. 3 is a dam in Maricopa, Arizona. The dam is owned by Arizona Public Service Company, Phoenix Office (public utility). It impounds the Offstream near Mesquite Generating Station.
The dam stands 45 feet tall and stretches 8,381 feet across, creates a reservoir covering 170 acres, has a maximum storage capacity of 7,419 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2009, the structure is relatively new.
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 04/09/2024.
At 45 feet, this dam is taller than 91% 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 Arizona 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 | Arizona |
| County | Maricopa |
| Nearest City | Mesquite Generating Station |
| River/Stream | Offstream |
| Coordinates | 33.54472, -112.33889 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 8,381 ft |
| Year Completed | 2009 (17 years old) |
Storage & Hydraulics
| NID Storage | 7,419 acre-ft |
| Max Storage | 7,419 acre-ft |
| Normal Storage | 6,544 acre-ft |
| Surface Area | 170 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | ARIZONA PUBLIC SERVICE COMPANY, PHOENIX OFFICE |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/09/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | AZ00314 |
| Federal ID | AZ00314 |
| More Info | State Dam Safety Program |