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Direct Pipe Developments in New Zealand

Since its introduction to New Zealand in 2017 McConnell Dowell has keep its equipment busy having now completed six Direct Pipe drives, installing over 14Km of pipeline. Including three wet recoveries and two world records for drive lengths (1.9Km and 2.1Km). Lessons from previous drives have driven change and since…

Drilling solutions for offshore wind foundations and export cable landfalls

The development of renewable energies is the focus for future energy supply. Large offshore wind farms are to be constructed and connected to the grid. Due to public environmental awareness, smart methods are required for fast and safe installation of foundations and cable landfalls. In addition to limitations in…

Duggan Sanitary Tunnel Replacement: Mitigating Sewer Odour in Several Edmonton Neighbourhoods

Duggan and surrounding neighbourhoods in Edmonton, Alberta have experienced sanitary sewer odour problems due to hydrogen sulphide for a number of years. The main 1,200 mm sanitary trunk (Duggan Tunnel) that services this neighbourhood, and approximately 75,000 residents upstream, was constructed in the 1970s, at a…

EPR Rehabilitation of Asbestos-Cement Pipeline

Abstracts should be limited to 250 words maximum. Goulburn Valley Water (GVW) and Intelligent Water Networks have co-funded the world first trial of encapsulAC EPR for rehabilitation of an asbestos cement (AC) water main in Fair Street, Shepparton. There are approximately 50,000 km of operating AC water and sewer…

Estimating Depth of Neuralization in Concrete Using Nearinfrared Spectroscopy with Hyperspectral Camera

Carbonation of concrete is one of the deterioration mechanisms observed in reinforced concrete structures, such as manholes, utility conduits, and tunnels. Since carbonation leads to the corrosion of embedded reinforcing steel, regular inspection is necessary. However, current inspection methods rely on destructive…

Experimental Study on the Longitudinal Strain Behavior of Cured-in-Place Pipe Liners Crossing Joints in Reinforced Concrete Culverts

The structural integrity and durability of culverts, such as reinforced concrete pipes (RCPs), are significant concerns as aging stormwater systems deteriorate over time. Trenchless rehabilitation techniques, particularly Cured-in-Place Pipe (CIPP) liners, have emerged as efficient alternatives to complete pipe…

Finite Element Analysis of Deteriorated Host Pipe

A 2.5 km DN 750 MSCL sewer rising main in Sydney experienced eight failures over 23 years prompting urgent intervention prior to scheduled amplification and replacement. Sydney Water initiated an emergency rehabilitation project to install a flexible reinforced hose liner in six stages over 12 months. The selected…

From Rust to Robust: A CFRP Trenchless Triumph in Penstock Repair

Penstocks form the backbone of hydropower generation, channeling high-pressure water from reservoirs to turbines with minimal energy loss. Their design and integrity are critical to the reliable delivery of peak electrical demand. As these assets age, maintaining structural performance while minimizing environmental…

GFRP Carrier Pipe - Challenging Environment

GIS-Driven Site Selection for the Pitt River Water Supply Tunnel: A Systematic Approach to Shaft and Alignment Optimization

This paper presents the application of Geographic Information System (GIS) technology to optimize site selection and determine the preferred alignment for the Pitt River Water Supply Tunnel. The methodology integrates geotechnical, environmental, social and spatial data within a 1,500-hectare study area to identify…

Gold Coast Light Rail – Stage 3: Successfully Delivering Multiple Service Crossings in Challenging Subsurface and Surface Environments

The Gold Coast Light Rail Stage 3 (GCLR3) project involves the construction of a new light rail which runs from Broadbeach in the north, along the Gold Coast Highway, to Burleigh Heads in the South. The 6.7km extension includes new dual-track light rail, 8 new light rail stations, new light rail-bus connections, and…

Guidelines for HDD – ASTM F1962 vs. MAB-7 What’s the Difference?

ASTM F1962, “Standard Guide for Use of Maxi-Horizontal Directional Drilling for Placement of Polyethylene Pipe or Conduit Under Obstacles, Including River Crossings”, was most recently revised in early 2025. MAB-7, “MAB Guidelines for Use of Mini-Horizontal Directional Drilling for Placement of HDPE (PE4710) Pipe in…

Horizontal Auger Boring and the Canadian National Railway GEO-FORM

This paper presents a case study of a geotechnical assessment conducted by Thurber Engineering Ltd. for Whitecap Resources Inc. The assessment evaluates the geotechnical conditions pertinent to two trenchless Canadian National Railway (CN Railway) line crossings near Fox Creek, Alberta. The case study outlines…

How municipalities use LED light-cured CIPP technology to prioritize scheduling and budgeting of residential and commercial sewer rehabilitation.

Municipalities find that self-performing wastewater infrastructure repair and renovation projects significantly increases flexibility both in budgeting and in scheduling. LED light-cured CIPP lining technology contributes greatly to that capability. The method is fast, requires relatively low capital outlay and is…

How to Use an Incident to Future Proof Aeging Assets

As our urban environments expand, underground utilities need to accommodate the increased use and effects of climate change and severe weather events. In recent years, Auckland has been impacted by severe rain events, successive flooding, and a cyclone in 2023. The Orakei Main Sewer was constructed at the beginning of…

Increasing ground condition certainty by using combined geophysical methods for geotechnical baseline reports

Yarra Valley Water’s (YVW) Community Sewerage Program delivers new sewerage infrastructure to properties in Melbourne’s existing communities. Areas like the Dandenong Ranges pose construction challenges due to steep terrain and the presence of rhyodacite boulders, or ‘floaters’. Trenchless technology is an effective…

Innovative Solutions for Assessing Aging Sanitary Forcemains in Harsh Climates

Assessing the structural integrity and hydraulic performance of buried sanitary conveyance systems is essential for municipalities to prioritize their repairs, prevent costly emergencies, and reduce public and environmental impacts. This work presents a condition assessment program for two forcemains: a 2.3 km long…

Innovative Underwater Maintenance: Enhancing Low-Level Outlet Repairs with ROVs and Photogrammetry

Maintaining and repairing low-level outlets (LLOs) and intakes without upstream isolation presents a significant set of challenges, ranging from confined space risks to structural concerns and high costs associated with dewatering. Traditional methods often introduce additional complexities, underlining the need for…

Installing an Earthing System using Directional Drilling

All Electrical Networks rely on earthing systems to provide safe and efficient flow of electricity to protect the health of systems and its assets. Bad earthing can lead to expensive network outages, equipment failure and faults that can damage assets in the surrounding environment. Using Horizontal Directional…

Jansz IO Project

The Jansz IO HDD Project is one of the largest Horizontal Directional Drilling (HDD) projects completed in Australasia. Completed between 2021 to 2025, it presented challenges throughout the planning and execution process. This project consisted of the new installation of 3x 600m DN630 HDPE conduits for Chevron…

Lawrey Gardens Storm Sewer - 600mm CIPP Lining

The Lawrey Gardens Outfall B76 Local Drainage Improvement (LDI) project was initiated to address critical infrastructure deterioration and mitigate risks associated with a storm pipe and stormwater flow through a box culvert which crosses under railway tracks. Located in Calgary, Alberta, the site features aging…

Lessons Learned from the CIPP Lining of a 72-inch Sewer Interceptor Amidst Wetlands and Landfills

The City of Palo Alto (City) owns, operates, and maintains the 72-inch RCP gravity Joint Intercepting Sewer (JIS). Originally constructed in 1972, the 9,000-foot long JIS is the main sanitary sewer transmission system to the Regional Water Quality Control Plant (Plant), conveying more than half of the Plant’s influent…

Lessons learned from the West Trunk Sewer Pipe-Mississauga, Ontario

The West Trunk Sewer Pipe (WTSP) has a 9,777 m, 300 mm thick Cast-in-Place (CIP) plain concrete liner. Mining of the WTSP using a Tunnel Boring Machine started in 2013 and was completed in 2018. A minimum 90-day delay time between the tunnel mining and casting of the CIP liner was allowed to relieve some of the shale…

LONG DISTANCE MICROTUNNELING IN CALGARY AVOIDS LANDSLIDE HAZARD FOR THE NOSE CREEK PROJECT

The City of Calgary's Nose Creek Sanitary Sewer Trunk Phase B project will accommodate future growth in northern Calgary, Alberta. The project was designed by Jacobs and includes installation of approximately 1.4 miles of HDPE-lined reinforced concrete sewer pipe. The trenchless portions involve an 850-foot-long…