Hawaii Dams
124 dams tracked by the National Inventory of Dams
Total Dams
124
High Hazard
116
93.5%
Poor / Unsatisfactory
94
Average Age
92 yrs
Hazard Classification
High116 (93.5%)
Significant2 (1.6%)
Low5 (4.0%)
Condition Assessment
Satisfactory0 (0.0%)
Fair28 (22.6%)
Poor / Unsatisfactory94 (75.8%)
Not Rated2 (1.6%)
Federal
2
State
12
Local
23
Private
87
Tallest Dams
- Alexander141 ft
- Puu Lua Reservoir110 ft
- Wahiawa Dam98 ft
- Ku Tree Reservoir90 ft
- Kaneohe Dam83 ft
High Hazard Dams
- AlexanderHigh
- Puu Lua ReservoirHigh
- Wahiawa DamHigh
- Ku Tree ReservoirHigh
- Kaneohe DamHigh
Poor Condition Dams
- Puu Lua ReservoirUnsatisfactory
- Wahiawa DamPoor
- Ku Tree ReservoirUnsatisfactory
- Koolau ReservoirUnsatisfactory
- Horner ReservoirPoor
All Dams in Hawaii
Showing 26–50 of 116
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Piwai Reservoir Kauai County | 56 | 1916 | High | Poor |
| Piiholo 50 Mg Reservoir Maui County | 42 | 1971 | High | Unsatisfactory |
| Pia Mill Reservoir Kauai County | 17 | 1910 | High | Poor |
| Peahi Reservoir Maui County | 45 | 1924 | High | Poor |
| Pauwela Reservoir Maui County | 47 | 1904 | High | Poor |
| Papuaa Reservoir Kauai County | 48 | 1914 | High | Poor |
| Papaaea Reservoir Maui County | 37 | 1902 | High | Poor |
| Paauilo Reservoir Hawaii County | 34 | 1975 | High | Poor |
| Pa Aalii Reservoir Hawaii County | 40 | 1940 | High | Fair |
| Opaeula 01 Reservoir Honolulu County | 71 | 1910 | High | Fair |
| Omao Reservoir Kauai County | 32 | 1915 | High | Unsatisfactory |
| Olinda Reservoir Maui County | 42 | 1918 | High | Poor |
| Okinawa Reservoir Kauai County | 29 | 1920 | High | Poor |
| Oahu Reservoir 155 Honolulu County | 25 | 1916 | High | Poor |
| Nuuanu Reservoir No. 1 Honolulu County | 34 | 1905 | High | Poor |
| Nuuanu Dam No. 4 Honolulu County | 73 | 1910 | High | Fair |
| Napili 4-5 Desilting Basin Maui County | 18 | 1985 | High | Fair |
| Napili 2-3 Desilting Basin Maui County | 43 | 1988 | High | Fair |
| Mimino Reservoir Kauai County | 69 | 1920 | High | Poor |
| Middle Field 14 Reservoir Maui County | 36 | 2006 | High | Unsatisfactory |
| Mau Reservoir Kauai County | 38 | 1901 | High | Poor |
| Maunaolu Reservoir Honolulu County | 27 | 1966 | High | Fair |
| Mauka Reservoir Kauai County | 19 | 1910 | High | Poor |
| Maui Reservoir 92 Maui County | 16 | 1967 | High | Poor |
| Maui Reservoir 90 Maui County | 22 | 1917 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.