News

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, both subsidiaries of Southland Holdings, successfully implemented the first use of a tunnel boring machine (TBM) in the State of Hawaii and Island of Oahu. The project conveys wastewater from the Kaneohe Wastewater Pre-Treatment Facility to the Kailua Regional Wastewater Treatment Plant to prevent overflows and spills during heavy rain events.

Working within unique island conditions, Southland/Mole coordinated closely with state, city and county environmental permitting and enforcement agencies to ensure minimal impact to the project’s surrounding areas. Groundwater controls, community engagement and equipment procurement and logistics were also significant factors for success.

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