Shore Protection - Nawiliwili Breakwater

Kauai, HI

Dolos and Tri-bars were used to repair damaged sections of the breakwater that protects the entrance to Nawiliwili Harbor on the east coast of the island of Kauai, Hawaii. 

The dolos were typically placed in a single layer on the ocean side over existing 18-ton Tri-bars and under-layer stones, while the smaller Tri-bars were placed in a single layer over under-layer stones on the harbor side of the breakwater.



Precast Concrete Armor Units
  • 371 (ea) - 23 ton Dolosse
  • 355 (ea) - 6½ ton Tribars


Steel Reinforcement - These armor units are lightly reinforced with #4 and #5 rebar having a minimum of 6" concrete cover.
Handling - No lifting devices cast in the concrete - all units were handled with slings
Cast Off-Site - Dolos and Tri-bars cast in Tacoma, WA and barged 2500 miles to Hawaii


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