News

Honolulu Ranks No. 1 in World Sanitation

  Honolulu is ranked No. 1 globally in sanitation, according to a recent report by Mercer, an international consulting firm. Mercer based the ranking on “analyses (of) cities’ waste removal and sewage infrastructure, levels of infectious disease, air pollution, water availability and quality.” After Honolulu, the next top ranking...

Two Southland Holdings Projects Receive International Tunneling Awards

Southland Holdings LLC has been awarded two international tunneling awards from New Civil Engineer. Recognition includes Tunneling Project of the Year (over $150m) for the Kaneohe/Kailua Sewer Tunnel Project The Kaneohe/Kailua Sewer Tunnel Project was recognized as Tunneling Project of the Year (over $150m). The Southland/Mole joint venture,...

2017 Tunnelling Project of the Year

Southland Holdings wins the Tunnelling Project of the Year (over $150m) award from New Civil Engineer Tunneling for its work on the Kaneohe/Kailua Sewer Tunnel Project.  Judges’ comment – The first tunnel project of its type in Hawaii (on the island of Oahu) including several ground treatment and support methodologies in...

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...
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