High Risk Dams in Puerto Rico

Puerto Rico has 12 high hazard dams with a condition assessment of poor or unsatisfactory. These are dams where failure would probably cause loss of human life and where recognized safety deficiencies have been identified.

Of the 36 high hazard dams in Puerto Rico, 12 (33%) have concerning condition ratings — 10 rated poor and 2 rated unsatisfactory.

Dam	County	Height (ft)	Condition	Purpose	Year
Garzas Dam	Adjuntas	201	Unsatisfactory	Hydroelectric	1943
Guayo Dam	Adjuntas	190	Poor	Hydroelectric	1956
Guayabal Dam	Villalba	130	Poor	Irrigation	1913
Comerio Ii Dam	Comerío	128	Poor	Hydroelectric	1913
Patillas Dam	Patillas	127	Poor	Hydroelectric	1976
Matrullas Dam	Orocovis	120	Unsatisfactory	Hydroelectric	1934
Guajataca Dam	Isabela	120	Poor	Hydroelectric	1927
Guineo Dam	Orocovis	115	Poor	Hydroelectric	1931
Carite Dam	Guayama	104	Poor	Hydroelectric	1913
Ajies Dam Structure 2a	Añasco	52	Poor	Flood Risk Reduction	1984
Daguey Dam Structure 3	Añasco	50	Poor	Flood Risk Reduction	1978
Comerio I Dam	Comerío	47	Poor	Hydroelectric	1907

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