Our Work

Western Harbour Tunnel

The Western Harbour Tunnel is being delivered in two stages with The northern section of the tunnel, Stage 2, delivered by Acciona Construction Australia. This stage of the Western Harbour Tunnel sees early work construction in 2023. Stage 2 includes connections from Stage 1 at Cove Street, Birchgrove, to the Warringah Freeway near North Sydney, and complete tunnel fit-out.

IEG engaged by Acciona Construction Australia to manage the 3D utilities model and coordinate with the project design and construct teams, and also undertake designs to support temporary works.

Client

Fish Passage: Reconnecting The Northern Basin Project

Providing Project Management to The Department of Planning and Environment through our highly experienced Associate Director Mick Slattery.

Fish for the Future: Reconnecting the Northern Basin project seeks to improve connectivity across the northern Basin and deliver ecological outcomes by reinstating the movement and abundance of migratory native fish species.

This major infrastructure program aims to address barriers to fish passage at priority sites across the northern Basin, providing a connected ‘highway’ for native fish to migrate. Infrastructure solutions aiding fish migration will primarily be focused on the construction of fishways.

Client

M1 Pacific Motorway Extension To Raymond Terrace

The M1 Pacific Motorway and Pacific Highway are critical links in the National Land Transport Network and among the busiest transport corridors in Australia.

IEG supported the John Holland Gamuda Joint Venture through Director Paul Wehbe acting as Utilities Design Manager for the first 2 months where he was able to rationalise utility designs and eliminate the DN400 AGL HP Gas Main and save the project considerable time and money.

Client

M6 Stage 1

The M6 Stage 1 will deliver the missing link from Sydney’s south to the wider Sydney motorway network making journeys easier, faster and safer. It will remove more than 2,000 trucks a day from surface roads, and help return local streets to local communities.

IEG supported WSP with utilities 12D modelling and automation with our senior digital engineering leader Kelly Lin.

Client

M5 Motorway Westbound Bridge Upgrade and Early Works

IEG undertaking the utilities design with Aurecon for M5 Motorway westbound bridge upgrade main works and early works packages.

Working closely with the Aurecon team and TfNSW, IEG delivered the main works concept and is completing the early works due mid 2023.

Key elements:

Utilities Design
Management Plan
Micro Tunneling
Authority Engagement
ASP3 – 33kV – LV services relocations
DN750 Sewer Main
Secondary Gas

Clients

AWRC Wastewater Treatment Plant

As part of the process of treating wastewater, the AWRC will produce high-quality water suitable for a wide range of non-drinking uses in homes, for various industrial uses, in businesses, in agriculture and for watering of public open spaces.

Given its high quality, it can also be released to local waterways such as the Nepean and Warragamba Rivers to help sustain our important river ecosystems that continue to come under significant pressure from climatic changes and developments in their catchments.

IEG supported Durkin with data processing and modelling works for the investigations of the proposed route of the pipelines.

Client

Henry Lawson Drive Upgrade Stage 1B

Henry Lawson Drive Upgrade Stage 1B in Milperra spans approximately a 1.8 kilometre section of Henry Lawson Drive between Auld Avenue to the north and the approach to the M5 Motorway to the south. In June 2021 the NSW Government committed $22.5 million for the planning and design of the Henry Lawson Drive upgrade in Milperra between Auld Avenue and the M5 Motorway.

The upgrade consists of widening Henry Lawson Drive to four lanes, a road that would link Auld Avenue with Keys Parade, a road that would link Raleigh Road with Keys Parade, upgrades at intersections, and improved active transport connectivity along the corridor.

Clients

Great Western Highway Central Blackheath to Little Hartley

A preliminary concept design has been prepared for the Blackheath to Little Hartley tunnels and will continue to be developed with further consultation and environmental assessments. IEG led the utilities planning and design at the tunnel portals as well as initiating early conversations with utility authorities and establishing early works inputs.

Key tunnel features:

Around 11 kilometres long, generally to the south of the existing Great Western Highway and Mount Victoria
Twin tunnels allow for each direction of traffic to have a dedicated dual lane tunnel to separate traffic and increase safety
Wide road shoulders to allow vehicles to stop safely without interrupting traffic flow
A depth of up to 200 metres below ground at the deepest point to the south of Mount Victoria
Tunnel operation facilities including ventilation systems, drainage management, signage, lighting, and emergency evacuation systems.

Clients

Multi-Utility Corridor Network

WPCA are exploring how to best develop a network of purpose designed corridors for roads and service utilities.

More efficient ways to design and deliver electricity, gas, water and telecommunications infrastructure
Potential for multi-use underground corridor alongside roads
Incorporating dual purpose functionality, including usable recreational space

IEG undertook drafting and planning of utility placement across the alignments with Director Paul Wehbe supporting in an advisory role.

Clients

Mamre Road Upgrade

The NSW Government has committed $248 million to Mamre Road upgrade between the M4 Motorway, St Clair and Erskine Park Road, Erskine Park.

IEG Director Paul Wehbe provided Independent External Verification of the utilities design for Aurecon and TfNSW in a complex and congested corridor. A complex planning project that has key interfacing with Sydney Metro and the developing Western Parklands.

Independent External Verification
Certificate of Verification

Clients

Inland Rail Stockinbingal to Parkes (S2P) and Albury to Illabo (A2I)

The enhancement works to be conducted by Martinus Rail will ultimately enable double-stacked freight trains to run between Albury and Parkes and will include bridge upgrades and track lowering works to create the required height and width clearances.

Working with our Client Aurecon, the IEG team will deliver the utilities design and modelling.

Clients

Cottage Tree Bridge Renewal

IEG engaged to deliver utility designs for the Cottage Tree Bridge renewal for our client BG&E.

Early history of the bridge itself is unclear. Heritage consultants engaged by City of Newcastle reviewed a range of historic plans of the area. They determined that there has been a bridge in this location across Cottage Creek at Hunter Street for a considerable time, as detailed below.

In 1887 a steam tram line from Newcastle to Plattsburg (near Wallsend) was opened, with the route along Hunter Street and over Cottage Creek, and it is believed that a concrete bridge was in place at that time.