Dos Bocas Dam, also known as Lago Dos Bocas, is a gravity dam located on the Arecibo River in Puerto Rico. Completed in 1942, this hydroelectric structure stands at a height of 188 feet, with a hydraulic height of 148.08 feet. The dam has a storage capacity of 50,000 acre-feet, with a normal storage of 30,420 acre-feet and a surface area of 634 acres.

Managed by the Puerto Rico Electric Power Authority (PREPA), Dos Bocas Dam is used for hydroelectric power generation and is regulated by the state. The dam has a spillway width of 346 feet and a maximum discharge capacity of 200,000 cubic feet per second. Despite being categorized as having a high hazard potential, the dam is currently in satisfactory condition according to a 2020 inspection.

Dos Bocas Dam plays a crucial role in harnessing the water resources of the Arecibo River for power generation, while also providing flood control and water storage capabilities. With its picturesque location and important functions, Dos Bocas Dam serves as a vital infrastructure for water resource and climate enthusiasts to explore and appreciate in the beautiful region of Arecibo, Puerto Rico.