This was largest and final of three projects to compete the North South Road from Kapolei Parkway to H1. The 2.1-mile divided highway and utility corridor is now the main traffic artery for development between Kapolei and Ewa.
GBI’s work included over 240,000 cubic yards of excavation, much of which had to be hauled offsite. Crushed aggregate was used to construct the structural section of the road, and more than 20,000 cubic yards of riprap was placed in the drainage channel to dissipate energy.
Over 2.5 miles of large diameter water transmission main, 5,000 linear feet of large diameter sewer line, and 13,000 linear feet of storm drain were installed. The permanent roadway travel surface is concrete paving that was pre-formed by GBI using slip form methods. The successful paving of the road was due, in part, to GBI owning all of its paving equipment, none of which is more than three years old.
A major challenge to this project was the connection to and modification of Farrington Highway. This area included additional obstacles including two buried fiber optic lines, two large diameter water lines, four gas lines, and overhead high voltage lines. To work around these hazards and minimize traffic delays, GBI used trench-less excavation, successfully pipe jacking the large diameter storm drain under the highway without damage to the travel surface or existing utilities.