News Releases

USACE seeks public input for Honolulu Harbor modification feasibility study

U.S. Army Corps of Engineers, Honolulu District
Published March 23, 2023
Updated: March 29, 2023

The U.S. Army Corps of Engineers, Honolulu District (USACE), in partnership with the State of Hawaii Department of Transportation (HDOT), is hosting two public scoping meetings, March 30 and 31 from 5 to 6:30 p.m., to seek input on the preparation of the Honolulu Harbor Modification Feasibility Study to address potential impacts with improving the Honolulu Harbor Federal navigation channel.

The goal of the study is to investigate alternatives to improve ship navigation efficiency, reduce transportation costs, maintain safety in Honolulu Harbor, and improve the resilience of Harbor operations to meet the demand for goods in Hawaii and U.S. territories in the Pacific.

The public is invited to attend in-person or virtually to learn about the study and submit comments during a 30-day public comment period which runs from April 1 to May 1, 2023. 

U.S. Army Corps of Engineers, Honolulu District
Civil and Public Works Branch (CEPOH-PPC)
230 Otake Street
Fort Shafter, HI  96858-5440


USACE Honolulu District and HDOT signed a feasibility cost sharing agreement (FCSA) Sept. 23, 2022 to initiate a new start study for Honolulu Harbor. The study is estimated to cost a minimum of $3 million, cost shared 50/50 between HDOT and USACE, and take a minimum of three years to complete.  This study will be used as a basis for ensuring compliance with NEPA and evaluating alternative plans, including the "No Action" plan. The proposed alternatives identified include widening and deepening Honolulu Harbor channels and basins and consideration of nonstructural measures. The modification of the Sand Island Bridge, also known as the Slattery Bridge, and opening of the Kalihi channel are also being considered. The Integrated Feasibility Report and NEPA document will address dredged material management requirements for construction and long-term operations and maintenance.

The evaluation will examine the costs and benefits as well as the environmental impacts of modifying the maintained dimensions of the existing Federal project.

This Federal project was authorized by the Rivers and Harbors Acts of 1905, 1917, 1930 and 1954.  The Non-Federal Sponsor is the HDOT, Harbors Division. The authority to fund and conduct this feasibility study is Section 216 of the Flood Control Act of 1970 (Public Law 91-611).

For more information about the Honolulu Harbor Modification Feasibility Study or to subscribe to receive email updates visit the project website at:

The Public Notice can be viewed here:

The U.S. Army Corps of Engineers is responsible for delivering vital engineering solutions, in collaboration with our partners, to secure the nation, energize our economy, and reduce disaster risk. As the nation’s lead engineering and public works agency, we deliver quality projects, on time and within budget, - safely - for the American people.

Release no. 23-012