New Zealand Transport Agency projects team manager Simon
Underwood (left) and Downer site engineer Pete Sleeman
discuss progress of the Caversham highway development on
site yesterday. Photo by Linda Robertson.
Work on Dunedin's largest roading project is
Downer will soon add a second construction crew to the
Caversham highway project to make the most of longer days and
About 20 full-time workers are developing the Caversham side
of the four-lane highway, compacting a solid base for road
layers to go on top.
They have had to move electricity and telephone lines aside,
and embed a large stormwater pipe underneath to prepare for
construction of the widened road.
Downer site engineer Pete Sleeman said it was an exacting
process to ensure the base layers of the road were stable.
''The really important thing is getting that base right,
because that's what everything is built on. It's crucial to
have a good sub-grade, and we spend a lot of time testing it
as we go in stages,'' he said.
Workers were starting to form the turns from State Highway 1
in and out of Burnett St, and level off a future footpath
leading along the base of the steep bank on the left-hand
side heading up to South Rd.
From September, another crew will be simultaneously
continuing work on the Mornington side of the highway, below
There, new streetlamps have been installed this week but have
yet to be connected.
A footpath along the highway between Mornington Rd and
Aberfeldy St will be completed, some reserve access roads
tidied up, and the finishing touches put to a stormwater and
discharge catchment at the intersection with Aberfeldy St.
''We'll put in some more lights and work towards getting that
part ready for sealing,'' Mr Sleeman said.
Construction of the overbridge at the top of the hill will
start early in the new year, New Zealand Transport Agency
projects team manager Simon Underwood said.
''Geotechnically, the ground is quite challenging, and we've
done some more geotechnical testing at the top. The bridge
design has been reviewed in light of new information, so we
expect construction to be January onwards.''
There were no major design changes, just tweaks to ensure the
ground support and embankments were solid, he said.
The overbridge will be 7m above the road, allowing ample
clearance for large vehicles.
It was hoped the newly formed lanes on the Caversham side of
the highway will be ready for traffic by Christmas. Then
workers will progressively move across the highway.
Mr Sleeman said next year's construction would be the most
challenging, particularly while work was done between lanes
of traffic up the hill, while at the same time the overbridge
development at the top involved complex temporary
About 26,000 vehicles used the Caversham section of State
Highway 1 each day.
''We are conscious of working around the traffic as best we
can, to minimise disruption,'' Mr Sleeman said.
The entire multimillion-dollar project could be finished as
early as December next year, although it could be February or
March 2015 before workers move on, he said.