Honolulu Harbor is located on the southwestern coast of the island of Oahu. The project was authorized by the River and Harbor Acts of 3 March 1905, 8 August 1917, 3 July 1930 and 3 September 1954. The local sponsor is the State of Hawaii Department of Transportation Harbors Division. The project is in the operations and maintenance phase.
The project was completed prior to and during 1962 at a cost of more than $18 million and cost shared with the State of Hawaii Department of Transportation Harbors Division. The harbor consists of Fort Armstrong Channel (an entrance channel; 4.000 feet long, 500 feet wide and 45 feet deep); a main harbor basin (3,300 feet long, 1,520 feet wide and 40 feet deep); Kapalama basin (3,400 feet long, 1,000 feet wide and 40 feet deep); Kapalama channel (400 feet wide and 40 feet deep); and Kalihi Channel (400 feet wide, 35 feet deep).
Honolulu Harbor is the principal seaport of the State of Hawaii. Hawaii receives more than 98 percent of all goods through its harbors. Much of the containerized items are first shipped into Honolulu Harbor, then separated and trans-shipped to the neighbor islands.
The U.S. Army Corps of Engineers is responsible for maintaining the project depths in the channels and basins. Maintenance dredging was conducted in 2016 and is currently ongoing since 2021.