You are here

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 7/1/21

The contractor set bridge girders starting on January 11, 2021 and completed setting all eight girders on January 15th. Concrete for the bridge deck was poured on February 18th. The contractor poured all four wingwalls on March 12th and poured the end beams on the bridge on March 23rd. The utility contractor has been on site since the middle of March trenching and placing conduit for the dry utilities on the south end of the bridge. The contractor started the demolition for the existing underground dry utility infrastructure on the north side of the bridge on April 1st. The electrical contractor finished placing the underground conduit and concrete jacket on the south side by the end of March, moved to the north side of the bridge the second week of April and completed the underground utility infrastructure on the north end by April 23rd. The sleeper slabs were poured on April 9th and the approach slabs were poured on April 15th. The stamped concrete was poured on April 21st. The contractor placed the concrete for the Makai bridge rail on April 21st after the concrete for the roundabout truck apron was poured. Concrete for the bridge sidewalk and the curb and gutter and sidewalk on the Mauka side of Kuhio Highway, north of the roundabout and south of the bridge was completed in April. The Contractor completed the splitter islands (north and north half of the south splitter island) for the roundabout and completed all of the curb and gutter, sidewalk and approach road on the north end of the bridge in May. The contractor began grading the roadway to prepare for asphalt paving scheduled at the beginning of June. In the third week of May, the contractor started and finished the rock veneer face of the roundabout retaining wall and began grinding the bridge deck. By the end of May the contractor had removed the walking platforms from the sides of the bridge and began preparing for asphalt paving. The contractor plans to open the bridge by the middle of June, and to begin work on Phase 3 of the project (completion of the Makai side of the roundabout).

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.