Waterview Connection Stormwater, Streamworks and Flood Protection

Stormwater Conference

The Waterview Connection project for the NZ Transport Agency involves construction of 5 km of new motorway – half of it underground in tunnels – to connect the Southwestern and Northwestern motorways in Auckland.

Stormwater design for the motorway includes several kilometres of new pipe network, stormwater treatment devices, and connections to existing infrastructure. The more complex and challenging stormwater aspects included the integration with and utilisation of the existing SH16 drainage network, the innovative design and construction of tunnel drainage to capture and convey tunnel deluge flows, and a length of box culvert in a section of road with minimal cover to tie-in to the Oakley Creek motorway bridge aqueduct.

Large areas of Hendon Park and Alan Wood Reserve at the southern end of the project were subject to flooding from Oakley Creek before the project. The project required realignment of the creek away from the motorway route. This presented opportunities to increase conveyance for better management of flood flows, to improve in-stream habitat values and to naturalise the creek. Completion of the streamworks was critical to the timely commencement of tunnelling and to ensure adequate flood protection at the start of the tunnel enabling works.

Conference Papers Resource - Conference Papers Stormwater

3. Stefan Whiting & Tom Bassett.pdf

pdf
1 MB
22 Jun 2016