La Plata Dam
Key Takeaway
La Plata Dam is classified as high hazard in Puerto Rico. It was completed in 1974 and is 52 years old. Its primary use is water supply. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 131 ft (taller than 75% in PR) |
| Dam Type | Gravity |
| Max Storage | 37.0K acre-ft |
| Normal Storage | 22.7K acre-ft |
| Surface Area | 560 acres |
| Drainage Area | 181 sq mi |
| Max Discharge | 270,000 cfs |
| Year Completed | 1974 (52 years old) |
| NID ID | PR00017 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
PUERTO RICO AQUEDUCT AND SEWER AUTHORITY
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of La Plata Dam?
La Plata Dam is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates La Plata Dam?
La Plata Dam is owned by PUERTO RICO AQUEDUCT AND SEWER AUTHORITY (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was La Plata Dam built?
La Plata Dam was completed in 1974, making it 52 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of La Plata Dam?
La Plata Dam serves the following purposes: Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is La Plata Dam?
La Plata Dam has a dam height of 131 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was La Plata Dam last inspected?
La Plata Dam was last inspected on October 21, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.