Frequently Asked Questions

  1. What work has started on the Manukau Extension project?
  2. What steps are being taken to minimise harm to the environment?
  3. What will be done to reduce the impact of construction in the area?
  4. What about Hayman Park?

1. What work has started on the Manukau Extension project?

The first stage of the project started in September 2006 with drilling to test soil conditions, surveying and identification of services such as water and power supplies.

Since then 55,000 cubic metres of embankment has been constructed, 250 metres of stream has been diverted and 350 eels and other aquatic life have been transferred to local watercourses.

A pre-cast concrete yard has been established in Takanini and the manufacture of pre-stressed concrete beams has begun. The 34 metre long beams weigh up to 56 tonnes,and will form part of the bridge structures.

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2.What steps are being taken to minimise harm to the environment?

The project interacts with the Puhinui Stream in seven locations, and steps are being taken to protect the stream from sediment and pollutants, as well as physical damage to the banks.

Sediment is made up of the soil particles that are washed into the stream, which can block light and suffocate fish and other aquatic life.

When the motorway is completed, the landscaping will feature extensive planting of native plants and trees - including pohutukawa, flax and totara - creating a green corridor.

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3. What will be done to reduce the impact of construction in the area?

Transit and Leighton Works (the contractor) are required to mitigate the impacts of construction such as noise, traffic and dust. Haul roads have been carefully constructed to maintain traffic flow around SH1 and the construction area.

Transit will communicate with the public by distributing newsletters and traffic bulletins, as well as advertising when traffic shifts and road closures are about to take place.

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4. What about Hayman Park?

Hayman Park is an important green space in central Manukau which will be partially crossed by the SH20 Manukau Extension and a connecting road.

Manukau City Council is considering options for the portion of Hayman Park that will be affected by the project work. The area affected has been designated as part of the proposed route of the SH20 Manukau Extension for over 20 years.

As part of the motorway extension, native plants and trees will be planted to replace the non-native plants that are required to be removed from the area.