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Kapaa Stream Bridge and Mailihuna Int

Project Overview

The Central Federal Lands Highway Division of the Federal Highway Administration in cooperation with the Hawaii Department of Transportation is developing a project located on the Kuhio Highway, Route 56, near M.P. 10, the Kapaa Stream Bridge and Mailihuna Road intersection, on the Island of Kauai.

A Final Environmental Assessment (EA) and Finding of No Significant Impact (FONSI) has been prepared pursuant to HRS Chapter 343 (as amended), and Hawaii Administrative Rules Title 11, Chapter 200. The document published in the April 23, 2017 Office of Environmental Quality Environmental Notice and is available for download by clicking on the documents  at the bottom of this page.


HDOT has partnered with the USDOT Central Federal Lands Highways Division (CFLHD) to deliver bridge and other highway improvement projects throughout the islands.

Other HDOT/CFL MOA Partnership Projects


Project Details:

Under Construction
Island of Kauai, HI

The proposed project is located on the Kuhio Highway (Route 56) near mile post 10. The project would improve the safety and reliability of the Kapaa Stream Bridge, through rehabilitation or replacement, addressing bridge width, load capacity, bridge railing and transitions, and bridge approaches. The project also proposes to improve the highway intersection at Mailihuna Road, which would include roadway widening, lighting, signing, pavement markings, drainage, traffic signal installation, and other improvements.


Update 2/1/21

There is no new information to share at this time.

Update 1/1/21

There is no new information to share at this time.

Update 12/1/20

Contractor began spraying shotcrete on the face of GRS Wall A and B at the end of October and completed on November 2, the subcontractor stained the shotcrete wall on November 19 and 20. Complete the post-tensioning of girders G1-G5 and then completed grouting of the girder ducts on November 5. Contractor continued removal of the south bridge deck then completed the sheet pile for the cofferdam system and began removing the center pier. Contractor continued demo of the center pier throughout the month. Contractor completed excavation for the north abutment and began forming and tying rebar for Abutment 2. Contractor began excavation for the south abutment on November 16 to prep for Abutment 1 forming and rebar. Contractor is hopeful to pour Abutment 1 and 2 and set the girders before the Christmas break. Contractor poured and completed the concrete for the private driveway and turn around area. Contractor then started and finished forming the revisions of the catch basins to grated drop inlets on the north end of Mailihuna road. The grates for the revision is scheduled to be on site early December. Contractor requested a full road closure of Mailihuna road for the month of December to complete the catch basin revision and curb and gutter and other civil work with a committed to open Mailhuna Road on December 22, 2020.

Construction Activity Look Ahead:
Completing the pier demo, pouring Abutment 1 and 2 and setting the girders. Girder set is scheduled for December 15, but may be pushed to January due to north drilled shaft as-build locations.

Update 11/1/20

There is no new information to share at this time.

Update 10/1/20

Construction operation continues to advance. Demolition on the North half of Kealia Bridge was completed on September 2, 2020. Demolition work on the south span of the existing bridge resumed on September 14, 2020 and the GRS wall B excavation began. HDCC completed the closure pours for girders G5 - G8 in their stock yard. Sections for girders G1 - G4 begain arriving on site on September 24, 2020.

Update 9/1/20

Construction operation continues to advance with improvements made to Mailihuna Road as it connects with Kuhio Highway. Improvements include the installation of parallel walls, drainage, and sidewalk. Additionally, bridge construction is advancing with ongoing drilled shaft foundation work.

Update 6/1/20

Traffic was officially rerouted onto new Kapaa Temporary Bypass Road on April 7, 2020. Drilled shaft construction for the bridge foundation along with temporary utility relocation are underway. The foundation work is expected to take several months to complete.

Update 5/1/20

There is no new information to share at this time.