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GUAJATACA DAM

RESERVOIR LEVELS
Rock Dam Guajataca River
April 23, 2025


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Guajataca Dam, also known as Lago Guajataca, is a vital infrastructure located in Isabela, Puerto Rico, along the Guajataca River. Built in 1927 by the Puerto Rico Electric Power Authority, this earth dam stands at a height of 120 feet and serves multiple purposes, including hydroelectric power generation, irrigation, and water supply. With a storage capacity of 49,200 acre-feet and a maximum discharge of 34,600 cubic feet per second, the dam plays a crucial role in water resource management in the region.

Despite its importance, Guajataca Dam is facing challenges in terms of its structural integrity and hazard potential. The dam has been classified as having a high hazard potential and poor condition assessment, indicating the need for significant maintenance and repair work. The last inspection conducted in October 2019 highlighted the dam's poor condition, emphasizing the urgency of addressing these issues to ensure the safety of surrounding communities and the continued functionality of the dam.

While the risk assessment for Guajataca Dam is moderate, with a DSAC assigned date yet to be determined, it is evident that proactive risk management measures need to be implemented to safeguard the dam and the people living downstream. As a key water resource infrastructure in Puerto Rico, Guajataca Dam plays a crucial role in meeting the region's water needs and supporting sustainable development. It is essential for stakeholders to prioritize the maintenance and rehabilitation of the dam to mitigate potential risks and ensure the long-term reliability of this critical infrastructure.

Year_Completed 1927
Dam_Height 120
River_Or_Stream GUAJATACA RIVER
Dam_Length 984
Primary_Dam_Type Earth
Surface_Area 1000
Hydraulic_Height 116
Drainage_Area 30.08
Nid_Storage 49200
Structural_Height 120
Outlet_Gates None
Hazard_Potential High
Foundations Rock
Nid_Height 120
       

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