The Kaneohe-Kailua Wastewater Conveyance Tunnel project fulfills requirements of the Consent Decree between the City and County of Honolulu and the U.S. Environmental Protection Agency, increasing the reliability of the Windward Oahu sewer system. This project will install a new 3-mile long, 10-foot inside diameter tunnel from the Kaneohe WWPTF to a new Kailua Tunnel Influent Pump Station (TIPS) at the Kailua RWWTP. Per the Consent Decree, the project is to be operational on or before June 30, 2018.
The project will be constructed under three separate construction contracts. The Kaneohe-Kailua Sewer Tunnel contract is the first and includes the tunnel, new shafts at the Kaneohe and Kailua sites, and associated near surface structures at both locations. The second project includes the construction of the new Tunnel Influent Pump Station (TIPS) with associated odor control, a new headworks facility with associated odor control, and a new electrical building at the Kailua RWWTP. The third contract includes the construction of a Tunnel Influent Facility (TIF) at the Kaneohe WWPTF.
The Kaneohe-Kailua Tunnel contract was awarded in November 2013, with Notice to Proceed (NTP) on January 6, 2014. The Tunnel Boring Machine (TBM) was lowered into the Kailua launch shaft in April of 2015, and began mining from Kailua to the Kaneohe WWPTF on April 30, 2015. Final tunnel completion is anticipated in 2017.
The Kailua Tunnel Influent Pump Station and Headworks Facility project was awarded in August 2015, with NTP October 2, 2015. Construction of the Kailua TIPS and new headworks will commence in the summer of 2016, with testing and commissioning of the overall project completed by June 2018.
The below timeline highlights the major milestones that will take place throughout the duration of the total project