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Hanapepe River Bridge

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 Kaumualii Highway, Route 50, at M.P. 16.57, the Hanapepe River Bridge, 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 is available for download and review by clicking on the document link 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 project is located on the Kaumualii Highway (Route 50), the coastal perimeter road serving the west side. The subject bridge crosses the Hanapepe River near Hanapepe Bay. The project improves the safety and reliability of the Hanapepe Bridge, through rehabilitation or replacement, addressing bridge width, load capacity, bridge railing and transitions, bridge approaches and to mitigate the effects of scour.


Update 1/1/21

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

Construction activities post demolition of abutment 2.  On October 7, 2020, excavation for riprap began; elevations completed for each PVC sleeve in pier 1; phase 1 diaphragms prepped for pour.  October 8, 2020 Pier 1, phase 1 diaphragm pour scheduled and delayed by vehicular accident nearby. October 12, 2020, Span 1 deck formed; abutment 1 diaphragm formed;  old abutment 2 excavated; installation of post tension bearing plates, trumpets and duct for abutment post tensioning began. October 23, 2020, ironworkers finishing diaphragms; Contractor chipped foundation, prepping to pour concrete slab for abutment 2. 

Update 10/1/20

Ongoing construction activities include setting of span 1 girders 1 - 5, which began the night of September 8, 2020 and was completed successfully early on September 9, 2020. Girders were secured with cross-braces and cables over the next few days. Prep for Abutment 2 cofferdams began on September 10, 2020 and crane tear apart began. Prep and building of Pier 2 soffit form deck on September 11, 2020. On September 14, 2020, Contractor began building the east-side crane pad abutment 1 diaphragm. Pier 2 form building continued through the end of the week, subcontractor onsite, laying and typing pier 2 rebar. Assembly of the crane on the east-side began on September 19, 2020. Pier 2 cap was poured on September 21, 2020.

Update 9/1/20

Ongoing construction activities include demolition of the existing bridge structure. Concurrent with the demolition work, construction of the abutment walls and pier caps have been completed. The contractor is currently staging in preparation of launching the new bridge girders.

Update 6/1/20

The contractor has completed the drilled shaft foundation construction. Work continues on demolition of the existing bridge. Once the existing bridge is removed, contractor operations will include bridge abutments, pier cap construction, in preparation of placing the bridge girders.

Update 5/1/20

There is no new information to share at this time.