Guineo Dam, also known as Lago El Guineo, is a vital hydroelectric and irrigation structure located in Ciales, Puerto Rico. Completed in 1931, this rockfill dam stands at a height of 115 feet and has a hydraulic height of 106 feet, serving as a key component in harnessing the power of the Toro Negro River for energy generation and agricultural purposes. With a storage capacity of 2180 acre-feet and a maximum discharge of 7000 cubic feet per second, Guineo Dam plays a crucial role in water resource management and climate resilience efforts in the region.

Despite its historical significance and functional importance, Guineo Dam currently faces challenges in terms of its structural integrity and hazard potential. Classified as having a high hazard potential and assessed as being in poor condition, the dam requires immediate attention and maintenance to ensure its continued safe operation. With a risk assessment rating of moderate (3), the dam's risk management measures and emergency preparedness protocols need to be reviewed and updated to mitigate potential risks and safeguard the surrounding communities in case of emergencies.

As a prominent feature in the hydrological landscape of Puerto Rico, Guineo Dam serves as a reminder of the intricate balance between water resources, climate dynamics, and infrastructure resilience. With its rich history, functional versatility, and current maintenance needs, Guineo Dam stands as a symbol of the ongoing challenges and opportunities in managing water resources for sustainable development and climate adaptation in the region.