Guajataca Dam
Key Takeaway
Guajataca Dam is classified as high hazard in Puerto Rico. It was completed in 1927 and is 99 years old. Its primary use is hydroelectric. 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 | 120 ft (taller than 61.1% in PR) |
| Dam Length | 984 ft |
| Dam Type | Earth |
| Max Storage | 49.2K acre-ft |
| Normal Storage | 32.6K acre-ft |
| Surface Area | 1,000 acres |
| Drainage Area | 30 sq mi |
| Max Discharge | 34,600 cfs |
| Year Completed | 1927 (99 years old) |
| NID ID | PR00001 |
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 ELECTRIC POWER AUTHORITY
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Guajataca Dam?
Guajataca 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 Guajataca Dam?
Guajataca Dam is owned by PUERTO RICO ELECTRIC POWER AUTHORITY (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Guajataca Dam built?
Guajataca Dam was completed in 1927, making it 99 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 Guajataca Dam?
Guajataca Dam serves the following purposes: Hydroelectric, Irrigation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Guajataca Dam?
Guajataca Dam has a dam height of 120 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 Guajataca Dam last inspected?
Guajataca Dam was last inspected on October 23, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.