The port authority for Kahului Harbor is the State of Hawaii's Harbors Division within the Department of Transportation. The State owns and operates three piers in Kahului Harbor.
Kahului Pier 1 is used to ship and receive conventional and containerized cargo and automobiles. It is also used to receive steel products, petroleum products, lumber, and coal. It ships molasses and bulk raw sugar. Kahului Harbor Pier 1 is also used for boarding passengers. Pier 1 in Kahului Harbor has berthing space of 411 meters (1350 feet) with alongside depth of 10.7 meters (35 feet) MLLW.
Matson Navigation Company manages a 13-acre storage area that includes 36 refrigerated container positions, at the rear of Kahului Harbor's Pier 1. Kahului Trucking and Storage Inc. has two molasses storage tanks with total capacity of 20 thousand tons. A manifold system and pipelines are used to receive petroleum products at Pier 1 in Kahului Harbor. Pier 2 has berthing space of 272 meters (894 feet) with alongside depth of 8.2 meters (27 feet) MLLW.
Kahului Harbor Pier 2 is used to ship and receive conventional and containerized general cargo and automobiles and to receive lumber, bulk cement, and liquefied petroleum gas. An HEI Company affiliate, Young Brothers Ltd. operates a paved storage area of about 7.5 acres at the rear of Piers 2 and 3 that includes 28 refrigerated container positions. Doing business as The Gas Company, Citizens Utilities Services has storage tanks with total capacity for 12.5 thousand barrels of liquefied petroleum gas at Kahului Harbor's Pier 2. The Hawaiian Cement Corporation has two storage tanks with total capacity for 3.8 thousand tons of bulk cement. Kahului Harbor's Pier 3 has berthing space of 152 meters (500 feet) with alongside depth of 5.2 meters (17 feet) MLW.
Pier 3 in Kahului Harbor is used for shipping and receiving conventional and containerized general cargo and automobiles. Kahului Harbor's Pier 3 also receives lumber, sand, and petroleum products, and steel products. Pier 3 is also used for mooring towboats and boarding passengers. Tesoro Petroleum Corporation operates six storage tanks with total capacity for 135 thousand barrels at Kahului Harbor's Pier 3. Shell Oil Company has a 27-thousand-barrel capacity storage tank at Pier 3, and Maui Electric Company has three storage tanks with capacity for 83.9 thousand barrels.