Tallest Dams in Puerto Rico

Puerto Rico has 36 dams with recorded heights. The tallest is Cerrillos Dam at 323 feet. Taller dams impound more water and carry greater potential energy, which is why height is a key factor in hazard classification and inspection requirements.

#	Dam	County	Height (ft)	Type	Purpose	Hazard	Year
1	Cerrillos Dam	Ponce	323	Rockfill	Flood Risk Reduction	High	1992
2	Caonillas Dam	Jayuya	235	Concrete	Hydroelectric	High	1948
3	Portugues Dam	Ponce	220	Concrete	Flood Risk Reduction	High	2015
4	Toa Vaca Dam	Villalba	215	Concrete	Irrigation	High	1972
5	Garzas Dam	Adjuntas	201	Earth	Hydroelectric	High	1943
6	Guayo Dam	Adjuntas	190	Gravity	Hydroelectric	High	1956
7	Dos Bocas Dam	Arecibo	188	Gravity	Hydroelectric	High	1942
8	Lucchetti Dam	Yauco	169	Gravity	Irrigation	High	1952
9	La Plata Dam	Toa Alta	131	Gravity	Water Supply	High	1974
10	Guayabal Dam	Villalba	130	Buttress	Irrigation	High	1913
11	Comerio Ii Dam	Comerío	128	Buttress	Hydroelectric	High	1913
12	Patillas Dam	Patillas	127	Concrete	Hydroelectric	High	1976
13	Guajataca Dam	Isabela	120	Earth	Hydroelectric	High	1927
14	Matrullas Dam	Orocovis	120	Earth	Hydroelectric	High	1934
15	Cidra Dam	Cidra	115	Gravity	Water Supply	High	1946
16	Fajardo Dam	Fajardo	115	Earth	Water Supply	High	2002
17	Guineo Dam	Orocovis	115	Rockfill	Hydroelectric	High	1931
18	Carite Dam	Guayama	104	Earth	Hydroelectric	High	1913
19	Prieto Dam	Maricao	98	Gravity	Hydroelectric	High	1955
20	Loiza Dam	Trujillo Alto	95	Gravity	Hydroelectric	High	1954
21	Yahuecas Dam	Adjuntas	90	Gravity	Hydroelectric	High	1956
22	Vivi Dam	Utuado	85	Gravity	Hydroelectric	High	1950
23	Adjuntas Dam	Adjuntas	80	Gravity	Hydroelectric	High	1950
24	Las Curias Dam	San Juan	75	Earth	Recreation	High	1946
25	Loco Dam	Yauco	74	Gravity	Irrigation	High	1951
26	Coamo Dam	Santa Isabel	65	Buttress	Irrigation	High	1914
27	Rio �� Blanco Dam	Naguabo	64	Earth	Water Supply	High	2009
28	Ana Mariaâ V Dam	Ponce	53	Earth	Irrigation	High	1939
29	Ajies Dam Structure 2a	Añasco	52	Earth	Flood Risk Reduction	High	1984
30	Pellejas Dam	Adjuntas	50	Gravity	Hydroelectric	High	1950
31	Daguey Dam Structure 3	Añasco	50	Earth	Flood Risk Reduction	High	1978
32	Poncenaâ Dam	Juana Díaz	48	Earth	Irrigation	High	1939
33	Comerio I Dam	Comerío	47	Gravity	Hydroelectric	High	1907
34	Lago Regulador	Isabela	40	Earth	Water Supply	High	1996
35	Ana Mariaâ Ii Dam	Ponce	40	Earth	Irrigation	High	1939
36	Melania Dam	Guayama	30	Earth	Irrigation	High	1914

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