Northwest Demolition was contracted for the expansion redevelopment efforts of the Honouliuli Wastewater Treatment Plant in Ewa Beach, HI. Project scope includes the demolition of gravity thickeners, heat exchangers, thermal conditioning building, dewatering building, chemical storage building, and the incinerator building, as well as support facilities including a solids dewatering odor control system and over 500 linear feet of effluent channel. The project was separated into 3 phases to account for the construction build-back operations, requiring strict schedule coordination and the simultaneous operation of several subcontractor trades onsite. NWDD mobilized a fleet of specialized equipment, including a high reach excavator capable of working at heights over 90’, specialized concrete processing attachments, and integrated dust suppression systems to complete the heavy concrete demolition while minimizing impacts to the surrounding plant, which remaining online for the duration of the project. Prior to demolition, NWDD salvaged 4 centrifuge units and associated electrical control systems, an above-ground fuel storage tank, as well as a host of miscellaneous polymer tanks and componentry for reuse by an industrial specialty contractor. In total, over 5000 tons of concrete was segregated, processed, and recycled, in addition to the over 1500 tons of C&D debris that was sent to the landfill.
This project showcases Northwest Demolition’s ability to utilize specialized equipment to meet the demanding needs of a complex heavy infrastructure demolition while managing a myriad of subcontractor trades in a congested working site. All work to date has been completed ahead of schedule and without a single safety incident.