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 1–25 of 28
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Aepoeha Reservoir Kauai County | 42 | 1913 | High | Fair |
| Aepo Reservoir Kauai County | 74 | 1901 | High | Fair |
| Alexander Kauai County | 141 | 1931 | High | Fair |
| Hanakaoo Reservoir Maui County | 30 | 1918 | High | Fair |
| Honokowai - Structure #8 Maui County | 50 | 1995 | High | Fair |
| Kaili Ili Reservoir Maui County | 25 | 1984 | High | Fair |
| Kaneohe Dam Honolulu County | 83 | 1980 | High | Fair |
| Kaopala Basin Maui County | 30 | 1998 | High | Fair |
| Kauai Lagoons Kauai County | 13 | 1987 | High | Fair |
| Kualapuu Reservoir Maui County | 58 | 1969 | High | Fair |
| Maui Reservoir 22 Maui County | 30 | 1917 | High | Fair |
| Maui Reservoir 40 Maui County | 47 | 1926 | High | Fair |
| Maui Reservoir 80 Maui County | 29 | 1917 | High | Fair |
| Maunaolu Reservoir Honolulu County | 27 | 1966 | High | Fair |
| Napili 2-3 Desilting Basin Maui County | 43 | 1988 | High | Fair |
| Napili 4-5 Desilting Basin Maui County | 18 | 1985 | High | Fair |
| Nuuanu Dam No. 4 Honolulu County | 73 | 1910 | High | Fair |
| Opaeula 01 Reservoir Honolulu County | 71 | 1910 | High | Fair |
| Pa Aalii Reservoir Hawaii County | 40 | 1940 | High | Fair |
| Plantation Reservoir Maui County | 31 | 1989 | High | Fair |
| Pond No. 1 At Kauai Ranch Kauai County | 32 | 2007 | High | Fair |
| Punawai Reservoir Hawaii County | 38 | 1970 | High | Fair |
| Puukapu Watershed Retarding Dam R-1 Hawaii County | 12 | 1965 | High | Fair |
| Waikoloa Reservoir No. 2 Hawaii County | 35 | 1975 | High | Fair |
| Waikoloa Reservoir No. 3 Hawaii County | 54 | 1985 | High | Fair |
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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.