The Kaneohe-Kailua Gravity Sewer Tunnel Project is an approximately 3-mile-long (4.82km) tunnel from Kaneohe Wastewater Pre-Treatment Facility (WWPTF) to Kailua Regional Wastewater Treatment Plant (WWTP) that will be constructed by TBM about 15ft in diameter. A 10ft interior diameter pipe will be installed into the bored tunnel. The alignment starts at a depth of approximately 35ft below ground level at the Kaneohe WWPTF, and ends approximately 62ft below ground level at the Kailua Regional WWTP.
The sewer tunnel will fulfill a portion of the First Amended Consent Decree mandated by the U.S. Environmental Protection Agency (EPA) and the Hawaii Department of Health (DOH) to implement remediation projects on Oahu over the next 25-28 years, focusing on the wastewater collection system and wastewater treatment plants (WWTP).
