News

Hawaii’s New Wastewater Link

In June 2016 boring was completed on Hawaii’s largest ever wastewater tunnelling project, which has been designed to increase storage capacity of the region’s wastewater system and reduce the likelihood of overflow. The project also marks the first time in Hawaii’s history that a tunnel boring machine (TBM) has...

Big Bore in Hawaii: Robbins TBM Sets New Standard for Aloha State

The Hawaiian Islands, essentially the exposed seamounts in a vast chain of oceanic volcanoes, have a long and fiery history. The volcanoes laid down basaltic bedrock that can sometimes prove to be a challenging substrate for underground construction projects. Tunnels in Hawaii have historically been smaller, of the microtunneling variety....

Protecting Paradise

Bowers + Kubota’s Work Helps to Protect Honolulu from Sewage Spills  by Alan Dorich The island of Oahu, Hawaii, is considered both a paradise for tourists and an environmentally sensitive, pristine environment. “You definitely don’t want to be fouling it up with sewage spills,” Robert J. Kroning says. Kroning...

KK Gravity Sewer Tunnel Breaks Through

‘Rock Girl’ retires as work begins on Kailua pump station By Brett Alexander-Estes Pohakulani—aka “Rock Girl,” the city’s bedrock-chomping tunnel borer—has called it a day. Project teams met beneath Oneawa Hills and on June 28 linked the two sections of the City & County of Honolulu’s Kaneohe-Kailua Gravity Sewer...

Tunneling in Paradise: Honolulu Progresses on Gravity Sewer Project

It’s the state’s largest-ever sewer project. Find out how a massive tunneling project is improving wastewater services on the Hawaiian island of Oahu. 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...

Boring completed on Honolulu sewer project

Boring on the largest ever sewer project in Honolulu has been completed, linking Kailua Regional Wastewater Treatment Plant (KWWTP) to the Kane‘ohe Wastewater Pre-treatment Facility (KWWPTF). The City and County of Honolulu began boring the 16,000 foot long, 13 foot diameter tunnel in April 2015, and reached depths of...

Sewer Gravity Tunnel Breaks Through

By Gordon Y.K. Pang    City contractors have successfully bored a 3-mile tunnel beneath Oneawa Hills, a critical component of the $371 million Kaneohe-Kailua Waste Water Conveyance and Treatment Facilities Project, Mayor Kirk Caldwell announced Tuesday. It took roughly 13 months for the tunnel-boring machine to drill the 13-foot-diameter puka that eventually will house a 10-foot pipe tasked with delivering sewage to...

Tunneling completed for Kaneohe-Kailua gravity sewer project

Click here to view the live broadcast    KANEOHE, OAHU (HawaiiNewsNow) – The drilling for the tunnel of the Kaneohe-Kailua gravity sewer was completed on Tuesday. The tunnel boring machine (TBM), nicknamed Pohakulani, finished the three mile excavation journey after 13 months. With this, the first phase of the project...
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