Plains Lpg Dam
Plains Lpg Dam is an earth dam located in Maricopa County, Arizona, built in 1977. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Plains Lpg Dam
Plains Lpg Dam is a dam in Maricopa, Arizona. The dam is owned by Plains Lpg Services, L.p. (private). It impounds the Unknown near Glendale.
The dam stands 23 feet tall and stretches 2,835 feet across, creates a reservoir covering 11 acres, and has a maximum storage capacity of 297 acre-feet. Completed in 1977, the structure is 49 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 11/19/2024.
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 | Glendale |
| River/Stream | Unknown |
| Coordinates | 33.54472, -112.33889 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 2,835 ft |
| Year Completed | 1977 (49 years old) |
Storage & Hydraulics
| NID Storage | 297 acre-ft |
| Max Storage | 297 acre-ft |
| Normal Storage | 255 acre-ft |
| Surface Area | 11 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | PLAINS LPG SERVICES, L.P. |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/19/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | AZ01096 |
| Federal ID | AZ01096 |
| More Info | State Dam Safety Program |