POWERDRAIN® used in Johnston Tunnel, NZ first tollway.

The Northern Motorway Extension is New Zealand’s largest road project investment and the nation’s first tollway. The route spans a scenic 7.5 kilometers between Orewa and Puhoi, north of Auckland and is planned to offer significant safety and greatly improved transit times for motorists. The infrastructure will also help to releive holiday time congestion and heavy traffic in Orewa and Silverdale.

The new route will include a total of 5 bridges and twin tunnels including the 290 metre long Johnson’s Hill Tunnel with twin entries. This tunnel is concrete lined, fully lit, ventilated and has a fire protection system. Along its various sections, ACO’s heavy duty trench drain was installed. Designers believed this system was sufficiently robust and secure for the tunnel application. In addition to this, ACO also supplied RHINOCAST®, 2 part access covers to meet the project’s load specification.

ACO’s civil construction products are installed globally in a number of infrastructure projects including roads, airports and ports. For over 15 years, Australasian Road Authorities have used ACO DRAIN systems in a variety of applications ranging from tidal flow, kerb drainage on footpath and super elevated medians, beneath overpasses and across interceptions.

For more information please contact:

John Sordo by email jsordo@acoaus.com.au or phone 02 4747 4000 or visit our web site: at www.acoaus.com.au