Kikiaola Light Draft Harbor-?Kekaha, Hawaii
The U.S. Army Corps of Engineers awarded Kiewit a $20 million project to remove and rebuild the existing east and west breakwaters as well as dredge the navigational channel of Kikiaola Light Draft Harbor on the island of Kauai, Hawaii.
The two breakwaters combined consist of more than 40,000 tons of stone. The armor stones range from 3.5 to 9 tons with an inner core consisting of 700 to 1,900 pounds. The stones were mined at the Kukuiula mass grading site in Koloa, Hawaii.
A mining excavator, with state-of-the art GPS technology is used to set stone for breakwater and excavate the existing jetty. Survey points are taken, using the excavator for all points below water and in hazardous areas. The jetty stones were placed on specially designed, 1-foot-thick rock-filled marine mattresses to provide a stabilized ground for each breakwater. The channel was suction dredged using an excavator on a floating barge.