Browse Dams
36 dams in the National Inventory of Dams.
National Inventory of Dams
Browse 36 dams from the NID database. Each record includes dam name, location, physical dimensions, hazard potential classification, condition assessment, purpose, owner information, and emergency action plan status. Use the filters below to search by state, hazard level, condition, or keyword.
| Name | State | County | Height (ft) | Hazard | Condition | Year | Purpose |
|---|---|---|---|---|---|---|---|
| Cerrillos Dam | Puerto Rico | Ponce | 323 | High | Satisfactory | 1992 | Flood Risk Reduction |
| Caonillas Dam | Puerto Rico | Jayuya | 235 | High | Satisfactory | 1948 | Hydroelectric |
| Portugues Dam | Puerto Rico | Ponce | 220 | High | Satisfactory | 2015 | Flood Risk Reduction |
| Toa Vaca Dam | Puerto Rico | Villalba | 215 | High | Satisfactory | 1972 | Irrigation |
| Garzas Dam | Puerto Rico | Adjuntas | 201 | High | Unsatisfactory | 1943 | Hydroelectric |
| Guayo Dam | Puerto Rico | Adjuntas | 190 | High | Poor | 1956 | Hydroelectric |
| Dos Bocas Dam | Puerto Rico | Arecibo | 188 | High | Satisfactory | 1942 | Hydroelectric |
| Lucchetti Dam | Puerto Rico | Yauco | 169 | High | Satisfactory | 1952 | Irrigation |
| La Plata Dam | Puerto Rico | Toa Alta | 131 | High | Satisfactory | 1974 | Water Supply |
| Guayabal Dam | Puerto Rico | Villalba | 130 | High | Poor | 1913 | Irrigation |
| Comerio Ii Dam | Puerto Rico | Comerío | 128 | High | Poor | 1913 | Hydroelectric |
| Patillas Dam | Puerto Rico | Patillas | 127 | High | Poor | 1976 | Hydroelectric |
| Matrullas Dam | Puerto Rico | Orocovis | 120 | High | Unsatisfactory | 1934 | Hydroelectric |
| Guajataca Dam | Puerto Rico | Isabela | 120 | High | Poor | 1927 | Hydroelectric |
| Fajardo Dam | Puerto Rico | Fajardo | 115 | High | Satisfactory | 2002 | Water Supply |
| Cidra Dam | Puerto Rico | Cidra | 115 | High | Satisfactory | 1946 | Water Supply |
| Guineo Dam | Puerto Rico | Orocovis | 115 | High | Poor | 1931 | Hydroelectric |
| Carite Dam | Puerto Rico | Guayama | 104 | High | Poor | 1913 | Hydroelectric |
| Prieto Dam | Puerto Rico | Maricao | 98 | High | Satisfactory | 1955 | Hydroelectric |
| Loiza Dam | Puerto Rico | Trujillo Alto | 95 | High | Satisfactory | 1954 | Hydroelectric |
| Yahuecas Dam | Puerto Rico | Adjuntas | 90 | High | Satisfactory | 1956 | Hydroelectric |
| Vivi Dam | Puerto Rico | Utuado | 85 | High | Satisfactory | 1950 | Hydroelectric |
| Adjuntas Dam | Puerto Rico | Adjuntas | 80 | High | Satisfactory | 1950 | Hydroelectric |
| Las Curias Dam | Puerto Rico | San Juan | 75 | High | Satisfactory | 1946 | Recreation |
| Loco Dam | Puerto Rico | Yauco | 74 | High | Satisfactory | 1951 | Irrigation |
| Coamo Dam | Puerto Rico | Santa Isabel | 65 | High | Satisfactory | 1914 | Irrigation |
| Rio  Blanco Dam | Puerto Rico | Naguabo | 64 | High | Satisfactory | 2009 | Water Supply |
| Ana Mariaâ V Dam | Puerto Rico | Ponce | 53 | High | Satisfactory | 1939 | Irrigation |
| Ajies Dam Structure 2a | Puerto Rico | Añasco | 52 | High | Poor | 1984 | Flood Risk Reduction |
| Daguey Dam Structure 3 | Puerto Rico | Añasco | 50 | High | Poor | 1978 | Flood Risk Reduction |
| Pellejas Dam | Puerto Rico | Adjuntas | 50 | High | Satisfactory | 1950 | Hydroelectric |
| Poncenaâ Dam | Puerto Rico | Juana Díaz | 48 | High | Satisfactory | 1939 | Irrigation |
| Comerio I Dam | Puerto Rico | Comerío | 47 | High | Poor | 1907 | Hydroelectric |
| Ana Mariaâ Ii Dam | Puerto Rico | Ponce | 40 | High | Satisfactory | 1939 | Irrigation |
| Lago Regulador | Puerto Rico | Isabela | 40 | High | Satisfactory | 1996 | Water Supply |
| Melania Dam | Puerto Rico | Guayama | 30 | High | Satisfactory | 1914 | Irrigation |
Frequently Asked Questions
Hazard potential is based on the consequences of dam failure, not the condition of the dam. High hazard means loss of human life is probable. Significant means economic and environmental losses are expected but no probable loss of life. Low means minimal losses are expected. The classification considers downstream population, infrastructure, and environmental resources.
Condition ratings reflect the physical state of the dam based on periodic inspections. Satisfactory means no deficiencies found. Fair means minor issues exist but no immediate action needed. Poor means safety deficiencies require remedial action. Unsatisfactory means the dam is unsafe and immediate corrective action is required.
Yes. Use the search field above to find dams by name. You can also combine the search with state, hazard, and condition filters to narrow your results. Each dam record links to a detail page with complete information.