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.