Update on City Rail Link Geotechnical Investigations in your area 23 September 2019 Dear Neighbours, We are undertaking geotechnical investigations in your area. These investigations will allow us to verify subsoil conditions and retrieve soil samples to inform the design of the City Rail Link. The geotechnical investigations boreholes will be undertaken by a specialised drilling subcontractor on behalf of the Link Alliance. The Link Alliance is a consortium of companies selected to deliver the CRL’s main stations and tunnels. The next investigations will start on Tuesday 01 October These sites are located on Vincent Street, Pitt Street, Karangahape Road and Mercury Lane. Indicative borehole locations:
What’s going to happen? The boreholes are required to confirm the underlying geological conditions and will be used to install instruments for monitoring the effect the excavation works has on the ground and ground movement. The work will involve drilling a hole in the footpath and into the road in some cases, cutting into the asphalt/concrete, removing the surface layers of ground material and hydro-excavating (water-blasting and using a vacuum truck) to carefully reveal the utilities laying underneath. We will position our borehole safely between exposed utilities. The plant and equipment used on site will include a concrete saw, small excavator, hydro-excavation truck, drill rig and a six-wheeler truck. The borehole is less than 80mm in diameter. Below is an image of a geotechnical drill rig similar to what will be used.
When will this work happen? It is expected the geotechnical investigations will commence 1 October. Each borehole will take approximately 4 days to complete. Working hours will be between 7pm and 10pm Monday to Saturday and will comply with the construction noise and vibration standards for the project. If investigations are not able to be completed on the scheduled dates due to poor weather or other unforeseen circumstances the local business and residents will be informed of any delays. How will this affect me? Aspects of the work, such as concrete-cutting, hydro-excavation and compacting, will create some noise and vibration. Noise mats will be used at each location to help reduce noise nuisance. Traffic management will be required to ensure a safe working area and may require partial traffic lane closures, footpath closures and diverting pedestrians around the works. The traffic management implemented will depend on the borehole location and the effect it may have on the public. We’ll try and minimise the impacts on the public as much as practicable and our works will not affect property access. Where can I go for more information? If you have any questions or concerns about these works, please email us at karangahape@linkalliance.co.nz or phone 0800 CRL TALK and press option 4 for Karangahape Station works. Information and updates are also available online at www.cityraillink.co.nz - including a page dedicated to Karangahape Station works www.cityraillink.co.nz/karangahape-station-works. You can also follow the CRL project on social media with Facebook, Instagram, YouTube and LinkedIn. The Karangahape Info Hub in the old Station Bar on Beresford Square will be open every Thursday from 5-6 PM until midDecember.