Trunk sewer upsized
North Shore City Council is upsizing its trunk sewer beneath the Northern Motorway.
The work, which is part of an upgrade to the main sewer that takes sewage from Sunnynook to the Wairau pumping station,
will stop the old, under-sized pipe from overflowing in wet weather.
It is one of many improvements happening around the city under Project CARE, North Shore City’s commitment to improving
beach and stream water quality.
Works and environment committee chairperson, Joel Cayford, says the council’s sewer improvement programme is on track.
“We’re working hard to make sure money is efficiently and carefully spent to get the maximum benefit in terms of
ensuring the quality of our environment in the future,” he says.
The new trunk sewer, which will be four metres under the motorway, will be constructed using underground,
micro-tunnelling technology and will not create any disturbance to motorists above.
Councillor Cayford says it makes sense to do the work now, before the construction of the 8.5km North Shore Busway
corridor from Albany to the Auckland Harbour Bridge.
The busway will form the spine of North Shore City’s Bus Rapid Transit (BRT) network, and make it easier to travel
around, across and through the city.
Construction of the busway came a step closer earlier this year when funding was approved for another part of the
project, the $36m Esmonde Rd Interchange.
Work has already begun on the interchange, which will provide links across the city from east to west, give northbound
access to the Northern Motorway, and local buses access to the Busway corridor.
Stage two of the trunk sewer project, which has been brought forward to prevent delays to the busway, is expected to
take five months to complete and will cost $2.2m.
The first stage of the project, from the Wairau pumping station, along Wairau Rd to Link Dr, will begin in October and
cost $3.5m.
ENDS