Loco Dam

LOCO RIVER· Yauco, Puerto Rico· Built 1951· Gravity· 74 ft tall
High Hazard Irrigation Water Supply State Government

Key Takeaway

Loco Dam is classified as high hazard in Puerto Rico. It was completed in 1951 and is 75 years old. Its primary use is irrigation. 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 74 ft (taller than 30.6% in PR)
Dam Length600 ft
Dam TypeGravity
Max Storage2.5K acre-ft
Normal Storage1.5K acre-ft
Surface Area69 acres
Drainage Area8 sq mi
Max Discharge24,500 cfs
Year Completed1951 (75 years old)
NID IDPR00004

Safety Information

High Hazard

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?

Emergency Action Plan: Yes
Last Inspection: December 10, 2021
State Regulated: Yes
Regulatory Agency: PREPA

Ownership

COMMONWEALTH OF PUERTO RICO

State Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of Loco Dam?

Loco 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 Loco Dam?

Loco Dam is owned by COMMONWEALTH OF PUERTO RICO (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Loco Dam built?

Loco Dam was completed in 1951, making it 75 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 Loco Dam?

Loco Dam serves the following purposes: Irrigation, Water Supply. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Loco Dam?

Loco Dam has a dam height of 74 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 Loco Dam last inspected?

Loco Dam was last inspected on December 10, 2021. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.