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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 been used to excavate a wastewater tunnel.

The new 4.9 km tunnel will link the Kailua Regional Wastewater Treatment Plant (KRWWTP) to the Kane‘ohe Wastewater Pre-treatment Facility (KWWPTF). Once operational, the tunnel will provide additional means of wastewater transportation and storage capacity, and reduce the risk of the KRWWTP overflowing when it exceeds its capacity.

The City and County of Honolulu’s Department of Environmental Services, and Department of Design and Construction are the key stakeholders in the project. Department of Design and Construction Director, Robert Kroning, says…

 

Click here to read the full article – Trenchless Magazine – Winter 2017 | Issue 34 (page 32 of the magazine, page 19 of the PDF)

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