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 |
|---|---|---|---|---|
| Kahakapao Reservoirs Maui County | 54 | 1990 | High | Poor |
| Kaawanui Reservoir Kauai County | 26 | 1950 | High | Poor |
| Ipuolono Reservoir Kauai County | 50 | 1910 | High | Poor |
| Ioleau Reservoir Kauai County | 48 | 1902 | Low | Poor |
| Hukiwai Reservoir Kauai County | 36 | 1910 | High | Poor |
| Huinawai Reservoir Kauai County | 47 | 1902 | High | Poor |
| Horner Reservoir Maui County | 70 | 1926 | High | Poor |
| Honokowai - Structure #8 Maui County | 50 | 1995 | High | Fair |
| Honokowai Reservoir Maui County | 31 | 1918 | High | Poor |
| Helemano 6 Reservoir Honolulu County | 38 | 1915 | High | Poor |
| Happy Valley Flood Prevention Maui County | 18 | 1980 | High | Not Rated |
| Hanakaoo Reservoir Maui County | 30 | 1918 | High | Fair |
| Halenanahu Reservoir Kauai County | 40 | 1920 | High | Unsatisfactory |
| Halaula Reservoir Kauai County | 26 | — | High | Poor |
| Haiku Reservoir Maui County | 43 | 1904 | High | Unsatisfactory |
| Elua Reservoir Kauai County | 34 | 1902 | High | Poor |
| Elima Reservoir Kauai County | 37 | 1901 | High | Poor |
| Alexander Kauai County | 141 | 1931 | High | Fair |
| Aii Reservoir Kauai County | 26 | 1920 | High | Poor |
| Aepo Reservoir Kauai County | 74 | 1901 | High | Fair |
| Aepoekolu Reservoir Kauai County | 40 | 1910 | High | Poor |
| Aepoeha Reservoir Kauai County | 42 | 1913 | High | Fair |
| Aepoalua Reservoir Kauai County | 35 | 1915 | High | Poor |
| Aahoaka Reservoir Kauai County | 38 | 1910 | 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.