Explanation of the recent noise

CYP’s explanation of the noise…

Good afternoon,

We hope that you have been keeping well in what is an uncertain time for us all at the moment.

I wanted to touch base about some works that have been occurring this week, starting on Sunday 24 May.

Unfortunately in the early hours of Sunday 24 May, bentonite from our TBM Alice made its way to surface via one of the penetrations in the station box. While this is not entirely unexpected in the station box where there are multiple excavation points, in this instance the bentonite made its way into the recently prepared roof slab for the middle box. The roof slab contains multiple layers of reinforced steel that were ready for a concrete pour to form a section of the station roof.

We had to immediately begin clean up works in the area, which included sucker trucks onsite undertaking clean up and dewatering in and around the steel reinforcement.

We apologise for the noise and inconvenience that these works have caused for residents. These critical works must be completed to ensure the structural integrity of the concrete pour and the future station roof.

The bulk of the cleanup is scheduled to finish today, however depending on the ongoing clean up and resolution of the issue, some sucker trucks may be onsite next week. The concrete pour will be put on hold until we are satisfied that the area is ready and complies to all the structural and quality requirements. Further detail on concrete pours in the middle box will be included in the June Construction Notification.

As always, we appreciate your patience as we undertake these works and again apologize for the unexpected impacts that it has caused.

Kind regards,

John Goding

Project Manager

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