Preventing overflow and spills

The Kaneohe-Kailua Wastewater Conveyance Tunnel, an approximately 3-mile-long 10-foot diameter gravity sewer tunnel, carries wastewater from Kaneohe’s Wastewater Pre-Treatment Facility (KWWPTF) to Kailua’s Regional Wastewater Treatment Plant (KRWWTP). This gravity sewer tunnel equalizes flow and helps prevent overflows and spills. Other project work included construction of new diversion structures, microtunneling, relocation of water, sewer, electrical, and SCADA facilities.