CONTRACT VALUE: $277.8M
The Honoluliuli Wastewater Treatment Plant (HWWTP) serves as the primary wastewater treatment plant for the West side of the island of Oahu. This project involves the expansion of the secondary treatment system at the HWWTP, which was needed not only to comply with new U.S. Environmental Protection Agency and the Hawaii State Department of Health requirements, but also to accommodate the increasing population on Oahu’s Ewa (West) Plain.
The work includes the construction of a massive 6.8-million-gallon Aeration Basin, six (6) secondary 2.5-million-gallon Clarifiers, a Blower Building, an Effluent Division Box, an Effluent Connection, an Effluent Junction Box, a secondary Emergency Generator Building, a Primary Switchgear Building, a Mixed Liquor Distribution Building, a Secondary Process Pump Station, and all associated utilities and pipelines to be installed by both pipe jacking/micro-tunneling and open excavation methods located on 24-acres of undeveloped land and three (3) acres on the existing wastewater treatment plant site.
This project reached completion in May 2024.
