Early Contractor Involvement
In April 2015, two Joint Venture Design and Construction contracts were awarded to provide early input into the CRL design for two ‘early works’ or ‘enabling works’ packages to be undertaken in the Downtown area. They were awarded to Downer NZ and Soletanche Bachy JV and Connectus (McConnell Dowell and Downer JV).
ECI – Contractor 1
Downer NZ and Soletanche Bachy (DSBJV) were chosen to progress the CRL work through and under Britomart Station and Queen Street to the Downtown Shopping Centre site. Construction commenced in July 2016.
Contract 1 included establishing temporary accommodation for Britomart Station’s ticketing and customer service operations, the underpinning of the historic former Chief Post Office building, to allow the construction of the rail tunnels beneath and reinstating Britomart Station and upgrading urban space and surrounding roads.
ECI – Contractor 2
Connectus (McConnell Dowell and Downer JV) were chosen to construct the cut and cover tunnels under and along Albert St from Customs Street to Wyndham Street.
Contract 2 commenced in December 2015 with a ‘pipe jack’ component relocating a major storm water line in Albert Street between Swanson and Wellesley Streets and strengthening and bridging a section of the Orakei Sewer Main at the intersection of Victoria Street and Albert Street.
Principal Technical Advisor (PTA)
In 2014 a consortium of engineers and architects led by Aurecon was awarded the role of Principal Technical Advisor (PTA) and contracted to work alongside the CRL project team. The role is to deliver reference design for the CRL.
The consortium includes Mott Macdonald, Arup and architects Grimshaw & Jasmax.
They provide a range of design services including:
- civil & structural design for bored & cut and cover tunnels
- geotechnical, rail alignment, hydrology, geology, architecture for stations
- pedestrian modelling
- acoustics, noise, vibration
- electrical & mechanical engineering for ventilation
- hydraulics and vertical transport
- security and building management
- overhead line equipment
- traction power
- safety & systems assurance including rail safety & human factors
- constructability and risk management
- rail operations including operational and maintenance
- quality assurance, fire engineering, resource management and environmental planning.
Many of the workers are specialists within the railway industry seconded in for unique project specific skills.
Reference design refers to a technical level of design that is intended for others to advance. Reference design for the CRL contains all the essential elements; however, future construction companies, for example may enhance or modify the design to achieve constructibility.
For the CRL, reference design has been undertaken by a Principal Technical Advisor (PTA) consortium led by Aurecon and including Jasmax, Grimshaws, Mott MacDonald, Golders and Arup. The PTA comprises a design team of architects and civil, structural, mechanical and electrical engineers and other specialists bought in for their skills unique to rail projects.