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 101–124 of 124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Puu Koa Reservoir Maui County | 37 | 1985 | High | Poor |
| Puu Lua Reservoir Kauai County | 110 | 1925 | High | Unsatisfactory |
| Puu O Hewa Reservoir Kauai County | 33 | 1915 | High | Poor |
| Puu Opae Reservoir Kauai County | 41 | 1930 | Low | Unsatisfactory |
| Puu Pulehu Reservoir Hawaii County | 21 | 1910 | High | Poor |
| Reservoir 140 Maui County | 35 | 1926 | High | Poor |
| Twin Reservoirs Kauai County | 49 | 1920 | High | Unsatisfactory |
| Upper Field 14 Reservoir Maui County | 38 | 1985 | High | Poor |
| Upper Helemano Reservoir Honolulu County | 51 | 1912 | High | Poor |
| Wahiawa Dam Honolulu County | 98 | 1906 | High | Poor |
| Waiakalua Reservoir Kauai County | 23 | 1920 | High | Poor |
| Waikaia Reservoir Kauai County | 30 | 1951 | High | Poor |
| Waikamoi Dam No. 2 Maui County | 35 | 1956 | Low | Poor |
| Waikamoi Reservoirs Maui County | 20 | 1980 | Significant | Poor |
| Waikoloa Reservoir No. 1 Hawaii County | 44 | 1970 | High | Poor |
| Waikoloa Reservoir No. 2 Hawaii County | 35 | 1975 | High | Fair |
| Waikoloa Reservoir No. 3 Hawaii County | 54 | 1985 | High | Fair |
| Waikoloi Reservoir Kauai County | 64 | 1958 | High | Poor |
| Wailua Reservoir Kauai County | 34 | 1920 | High | Fair |
| Wailuku Water Reservoir 10 Maui County | 52 | — | High | Unsatisfactory |
| Wailuku Water Reservoir 6 Maui County | 33 | — | High | Fair |
| Waimanalo 60 Mg Reservoir Honolulu County | 65 | 1993 | High | Fair |
| Waimea 60 Mg Reservoir Hawaii County | 52 | 1957 | High | Poor |
| Waita Reservoir Kauai County | 28 | 1906 | High | Poor |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.