Oldest Dams in Puerto Rico

Puerto Rico has 36 dams with recorded construction dates. The oldest dates to 1907 — 119 years ago. Older dams require particular attention for safety, as many were built before modern engineering standards.

#	Dam	County	Year Built	Age	Height (ft)	Hazard	Condition
1	Comerio I Dam	Comerío	1907	119 yrs	47	High	Poor
2	Comerio Ii Dam	Comerío	1913	113 yrs	128	High	Poor
3	Carite Dam	Guayama	1913	113 yrs	104	High	Poor
4	Guayabal Dam	Villalba	1913	113 yrs	130	High	Poor
5	Melania Dam	Guayama	1914	112 yrs	30	High	Satisfactory
6	Coamo Dam	Santa Isabel	1914	112 yrs	65	High	Satisfactory
7	Guajataca Dam	Isabela	1927	99 yrs	120	High	Poor
8	Guineo Dam	Orocovis	1931	95 yrs	115	High	Poor
9	Matrullas Dam	Orocovis	1934	92 yrs	120	High	Unsatisfactory
10	Poncenaâ Dam	Juana Díaz	1939	87 yrs	48	High	Satisfactory
11	Ana Mariaâ Ii Dam	Ponce	1939	87 yrs	40	High	Satisfactory
12	Ana Mariaâ V Dam	Ponce	1939	87 yrs	53	High	Satisfactory
13	Dos Bocas Dam	Arecibo	1942	84 yrs	188	High	Satisfactory
14	Garzas Dam	Adjuntas	1943	83 yrs	201	High	Unsatisfactory
15	Cidra Dam	Cidra	1946	80 yrs	115	High	Satisfactory
16	Las Curias Dam	San Juan	1946	80 yrs	75	High	Satisfactory
17	Caonillas Dam	Jayuya	1948	78 yrs	235	High	Satisfactory
18	Pellejas Dam	Adjuntas	1950	76 yrs	50	High	Satisfactory
19	Adjuntas Dam	Adjuntas	1950	76 yrs	80	High	Satisfactory
20	Vivi Dam	Utuado	1950	76 yrs	85	High	Satisfactory
21	Loco Dam	Yauco	1951	75 yrs	74	High	Satisfactory
22	Lucchetti Dam	Yauco	1952	74 yrs	169	High	Satisfactory
23	Loiza Dam	Trujillo Alto	1954	72 yrs	95	High	Satisfactory
24	Prieto Dam	Maricao	1955	71 yrs	98	High	Satisfactory
25	Yahuecas Dam	Adjuntas	1956	70 yrs	90	High	Satisfactory
26	Guayo Dam	Adjuntas	1956	70 yrs	190	High	Poor
27	Toa Vaca Dam	Villalba	1972	54 yrs	215	High	Satisfactory
28	La Plata Dam	Toa Alta	1974	52 yrs	131	High	Satisfactory
29	Patillas Dam	Patillas	1976	50 yrs	127	High	Poor
30	Daguey Dam Structure 3	Añasco	1978	48 yrs	50	High	Poor
31	Ajies Dam Structure 2a	Añasco	1984	42 yrs	52	High	Poor
32	Cerrillos Dam	Ponce	1992	34 yrs	323	High	Satisfactory
33	Lago Regulador	Isabela	1996	30 yrs	40	High	Satisfactory
34	Fajardo Dam	Fajardo	2002	24 yrs	115	High	Satisfactory
35	Rio �� Blanco Dam	Naguabo	2009	17 yrs	64	High	Satisfactory
36	Portugues Dam	Ponce	2015	11 yrs	220	High	Satisfactory

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