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BOSTON ROAD STORMWATER PROJECT

Client Metrowater
Project Value $2.5 million

Description : Installation of 250m of 1050 diameter and 150m of 1350 diameter pipes using trenchless techniques. The project also included the separation of 15 commercial properties and the installation of other lateral pipelines in the carriageway by open cut methods.

Relevant features
This project was tendered on the basis of using an open cut methodology to install the pipelines. Auckland Transport would only permit the use of trenchless installation methods due to the combined impact on the traffic of this and other major projects close by.
  
Working two 12 hour shifts per day, we successfully installed over 400m of 1050 and 1350 diameter pipes using pipe jacking techniques. Two of the drives were in excess of 150m long.
  
One of the major challenges was to install about 25m of the pipeline in solid basalt. This was achieved by constructing a timber heading and using manual tunnelling methods to install the pipe.
  
Although this project was competitively tendered for, it was administered under an alliance framework. Monthly payments were received on the basis of actual costs plus nominated margin. This gave the client value for money plus certainty of outturn cost.

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THE PARADE STORMWATER OUTFALL AND PIPELINE
Client: Auckland Council
Project Value: $5.3 million

This project involved the installation of a new stormwater pipeline and ...

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TRANSPOWER TUNNEL STRENGTHENING
Client: Transpower
Project Value: $1.2 Million

The existing reinforced concrete cable tunnel that is located under the Botany shopping centre was cracking and showing signs of potential failure...

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JACOBSON'S TUNNEL REFURBISHMENT
Client: Watercare Services Ltd
Project Value: $1.3 Million

Jacobson’s Tunnel is located in the Waitekere Ranges and was constructed in the 1960’s...