Tunneling for Kane‘ohe-Kailua gravity sewer project complete - boring machine completes three mile journey
Aug 08, 2016
Three miles of tunneling for the City and County of Honolulu’s largest sewer project, the Kane‘ohe-Kailua gravity sewer tunnel is complete. The route linking Kailua Regional Wastewater Treatment Plant (KWWTP) to the Kane‘ohe Wastewater Pre-treatment Facility (KWWPTF) took 13 months to bore through.
This milestone for the first phase of the Kane‘ohe-Kailua gravity sewer tunnel, called a “hole through,” represents the near-completion of the 13-foot diameter, roughly 16,000-foot long tunnel bored at depths of up to 400 feet. “Despite this being the largest sewer project in state history, this critical infrastructure project has had very little impact on our residents while ensuring our public and environmental health and safety for generations to come,” said Mayor Kirk Caldwell. “In addition to using gravity rather than energy, this project provides storage for wet-weather flows, preventing spills when wastewater flows exceed the system’s existing capacity.”
Southland Mole JV completed the 87-foot diameter shaft and sound retention wall at KRWWTP in January, 2015. The tunnel boring machine (TBM) was lowered approximately 77 feet below ground into the Kailua shaft and began boring a 13-foot diameter tunnel in April, 2015. The tunnel hit the halfway point from Kailua to Kane‘ohe in December 2015. Excavation from KWWPTF began August, 2015 in anticipation of the hole-through. The TBM will be dismantled and removed from the Kaneohe shaft, approximately 39 feet below ground level, at the end of June, 2016. The final activity of phase one will be to install and grout a pipeline 10-feet in diameter throughout the tunnel to transport wastewater flows. Pipe installation is expected to commence in August/September 2016.
Phase two of the project is installation of a tunnel influent pump station (TIPS) in the Kailua shaft. TIPS will receive and pump the tunnel flows up to the KWWPTF. The third and final phase of the project is construction of a tunnel influent facility (TIF) at the KWWPTF. Upon completion of all phases, the existing force main that transports wastewater from Kane‘ohe to Kailua will be decommissioned and the flows are expected to be redirected to the new gravity sewer tunnel in 2018.
More News and Articles
Apr 19, 2024
News
WATCH: Overnight with SAERTEX-LINER H20 in São Paulo
Available through Pipe Core, high-quality liner SAERTEX-LINER H20 performed under pressure in São Paulo, Brazil.
Maintaining aging potable water pipe infrastructure is a constant challenge …
Apr 17, 2024
News
Immersive media provides wastewater experience in Denmark
An immersive media experience (IMX) may not be what most people want when they think about industrial wastewater, but that is exactly what visitors can expect when they visit a new installation …
Apr 15, 2024
News
Spotlight on gender diversity at Pipe Core
Since founding in 2008, Pipe Core’s team has grown across all areas of the business and is now in a position where there are more females than males across the organisation. Research published in Harvard …
Apr 12, 2024
News
New Wave of Startups Scale Innovation to Solve Global Water Challenges
Innovators from Around the World Join Xylem’s 2024 Accelerator Program to Deploy Breakthrough Innovations for Utilities and Industrial Users of Water
A new group of startups …
Apr 08, 2024
News
Integrated sustainable electricity and clean drinking water systems
Altitude Water and New Use Energy Solutions have partnered to create integrated, mobile solar-plus-water generation systems that produce sustainable electricity and clean drinking …
Apr 05, 2024
News
How to Evaluate Hydraulic Fracture Risk in HDD Design
The design of horizontal directional drill (HDD) installations often requires an evaluation of the potential for hydraulic fracture of the soil layers through which an HDD passes. Evaluating …
Apr 02, 2024
News
Historic Project Linking Rome and Vatican City Uses Advanced Technology and Local Knowledge to Keep Water Flowing
Relocation of Major Sewer Infrastructure Enables Construction of Pedestrian Link for 35 Million Visitors to the 2025 Jubilee
Water …
Mar 27, 2024
News
USU Study Looks at Water Main Break Rates in the U.S. and Canada
Report Highlights Correlation Between Material and Diameter
Utah State University (USU) has published new research on water main breaks in the United States and Canada, examining …
Mar 26, 2024
News
Update BE-21: New Material in Course and Modules on Trenchless Pipe Installation
Online training on the topic of pipeline installation in civil engineering: Trenchless technology for underground drainage construction can be a resource-efficient, …
Mar 25, 2024
Article
Bacteria as a new weapon in wastewater treatment
In early November, San Diego based startup Aquacycl officially opened its first European office and test center at the Water Campus in Leeuwarden. The Netherlands Foreign Investment Agency (NFIA) …
Mar 22, 2024
News
A superior HDD offering
Building on its relationships with leading horizontal directional drilling companies, TRACTO Australia has delivered three new rigs to operator Superior HDD.
Based in New South Wales, Superior HDD specialises in horizontal …
Mar 20, 2024
News
New portable water filtration technology could improve access to clean drinking water worldwide
The University of Texas at Austin has developed an injectable water filtration system with the aim to aid the over two billion people worldwide who …
Contact
Department of Customer Services
550 South King Street
96813 Honolulu
United States