Guayabal Dam, also known as Lago Guayabal, is a significant water resource in Puerto Rico, serving primarily for irrigation purposes. Built in 1913 by the AMBURSEN ENGINEERING CO., this buttress dam stands at a height of 130 feet and has a maximum storage capacity of 7,600 acre-feet. Located in Juana Diaz, Villalba, Puerto Rico, the dam controls the flow of the Jacaguas River and covers a surface area of 373 acres, with a drainage area of 42.95 square miles.

With a high hazard potential and poor condition assessment, Guayabal Dam is in need of attention and maintenance to ensure its safety and functionality. The dam features a controlled spillway with a width of 693 feet and outlet gates consisting of Bascule and Uncontrolled systems. Despite its age, the dam remains state-regulated and undergoes regular inspections by the Puerto Rico Electric Power Authority (PREPA) to ensure compliance with safety standards.

Water resource and climate enthusiasts can appreciate the historical significance and engineering marvel of Guayabal Dam, as well as its vital role in sustaining agriculture and water supply in the region. As efforts are made to address its maintenance needs and improve its condition, the dam continues to play a crucial role in managing water resources and mitigating flood risks in Puerto Rico.