Dams in Hawaii

127
Total Dams
119
High Hazard
93.70%
% High Hazard
92.7 yrs
Average Age

Counties

CountyDamsHigh Hazard% HighAvg Age
Maui 56 53 94.64% 84.3 yrs
Kauai 48 45 93.75% 105.6 yrs
Honolulu 13 12 92.31% 97.0 yrs
Hawaii 10 9 90.00% 70.3 yrs

Purpose Breakdown

Irrigation
98
Flood Risk Reduction
12
Water Supply
9
Other
5
Fish And Wildlife Pond
2
Recreation
1
Hydroelectric
1
Debris Control
1

Tallest Dams in Hawaii

Dam NameHeightCountyHazard
Alexander 119 ft Kauai High Hazard
Puu Lua Reservoir 105 ft Kauai High Hazard
Ku Tree Reservoir 90 ft Honolulu High Hazard
Wahiawa Dam 88 ft Honolulu High Hazard
Kaneohe Dam 83 ft Honolulu High Hazard
Aepo Reservoir 70 ft Kauai High Hazard
Koolau Reservoir 70 ft Honolulu Low Hazard
Horner Reservoir 70 ft Maui High Hazard
Nuuanu Dam No. 4 66 ft Honolulu High Hazard
Opaeula 01 Reservoir 66 ft Honolulu High Hazard