ON DEMAND - Contaminated Sites – Challenges and Learnings

The Crown Sydney at, 271.3 m is the tallest building in Sydney and is located on a site contaminated by historical activities, including land reclamation and gasworks. To reduce overall project duration, it was built using an intricate ‘top-down’ method, with Ward’s bulk and detailed excavation taking place at the same time as construction of the superstructure.  Ward’s fundamental challenge was to undertake mining operations safely and efficiently within a highly regulated, contaminated, and enclosed work environment. Innovative solutions had to be utilised with the assistance of technology providers not traditionally used for remediation projects. With minimal storage space available due to the site location, sequencing of the works was critical to ensure a successful outcome.

This presentation will provide details of the various challenges, solutions considered, and the final solutions implemented. These will include:

1. Air flow and extraction system management
2. Escape hoods
3. Proximity sensors to mitigate plant on plant and plant on person collisions
4. Containerized spoil handling system

ABOUT THE SPEAKER:
Dave Condon, Construction Manager, Ward Civil

Dave has delivered many challenging projects over the last 13 years, managing site remediation, bulk and detailed excavation work, roadworks, airside, marine and subdivision projects. He believes in not necessarily reinventing the wheel, but changing the tyre from time to time, through embracing new technologies and integrating work practices that may not be typically associated with civil construction. The utilisation of the shipping containers on the Barangaroo project is evidence of a work practice commonly used in the transfer of mined materials via rail, and this has been utilised successfully through the delivery of this project to provide an alternative to the conventional truck and dog haulage of materials.