After 13 months of boring beneath the Oneawa Hills, contractors have holed through on a new wastewater tunnel that will connect the Kaneohe pretreatment facility with the Kailua Regional Wastewater Treatment Plant serving the city and county of Honolulu.The tunnel-boring machine and excavator met on the morning of June 28, and the tunnel-boring machine has been disassembled and removed. The 3-mile-long tunnel, designed to flow by gravity, is due to be finished by June 2018, after a liner piping has been installed and grouted in place and associated structures and shafts have been completed. Project cost is $173 million, and
