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 51–75 of 79
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mahinahina Reservoir Maui County | 34 | 1995 | High | Poor |
| Kumano Reservoir Kauai County | 48 | 1902 | High | Poor |
| Kepani Reservoir Kauai County | 40 | 1954 | High | Poor |
| Kemoo 5 Reservoir Honolulu County | 25 | 1920 | High | Poor |
| Kehalani Offsite Retention Basin Maui County | 30 | 2003 | High | Poor |
| Kaupale Reservoir Kauai County | 50 | 1910 | High | Poor |
| Kapa Reservoir Kauai County | 24 | 1901 | High | Poor |
| Kapaia Reservoir Kauai County | 53 | 1910 | High | Poor |
| Kaneha Reservoir Kauai County | 51 | 1910 | High | Poor |
| Kaloko Reservoir Kauai County | 46 | 1890 | High | Poor |
| Kalihiwai Reservoir Kauai County | 25 | 1920 | High | Poor |
| Kahoma Reservoir Maui County | 60 | 1918 | High | Poor |
| Kahana Nui Dam Maui County | 58 | 1984 | High | Poor |
| 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 Reservoir Maui County | 31 | 1918 | High | Poor |
| Helemano 6 Reservoir Honolulu County | 38 | 1915 | High | Poor |
| Halaula Reservoir Kauai County | 26 | — | High | Poor |
| Elua Reservoir Kauai County | 34 | 1902 | High | Poor |
| Elima Reservoir Kauai County | 37 | 1901 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.