New Zealand Transport Agency has begun work on the finer
details of a major new Dunedin bridge at Lookout Point and
heavy machinery is due to swing into action in September.
That follows substantial below-ground problems that have
pushed completion of the project back to May next year.
The latest stage of the project will also bring changes next
month to access from South Rd to Riselaw Rd, and the closure
of an intersection at Short St.
The bridge is part of stage two of the Caversham Valley
Safety Improvement Project, and will connect Riselaw and
Mornington Rds over the highway.
The stage had an initial budget of $23 million, but
geotechnical problems, including the discovery of a fault
line and underground hole the size of a double garage earlier
this year, would make a difference.
NZTA Caversham Highway Improvements Project manager Simon
Underwood said he would ''rather not say'' what the cost
increase might be.
Stage one of the project widened the highway between
Andersons Bay Rd and Barnes Dr to a consistent four lanes.
The second stage is widening and realigning the highway from
Barnes Dr to Lookout Point, and includes the new bridge.
A computer-generated image of the bridge - which the agency
says will be subject to detail changes as it develops - shows
embankments up to 7m high that will be built on either side.
Mr Underwood said some details of the bridge might change
from the image provided, as final designs took place.
Downer project manager Tony Clough said Dunedin City Council
building consent for the bridge was expected by September.
Foundation work should then begin. Seven concrete piles were
to be put in place.
The piling work was expected to be finished by Christmas.
Construction of the embankments would take place around the
Mr Clough said the work would involve between 10 and 15
workers at different times, and the bridge - and stage two of
the project - should be completed in May.
Other work being done included moving city-bound traffic
lanes on to a new area of road that had been constructed on
the Mornington side of the highway.
That was expected from mid-to-late August.
The speed limit would be increased to 60kmh on the downhill
From early August, there would be two significant changes to
traffic movement near Lookout Point, Mr Underwood said.
Short St, which runs from Kaikorai Valley Rd to the highway,
would be closed permanently at the highway intersection.
From August 1, South Rd would no longer connect directly to
Instead, drivers from South Rd wanting access would need to
go via the highway and an off-ramp back on to Riselaw Rd.
That change would be permanent.
Mr Underwood said while the road and bridge work was being
done, the city council was continuing upgrade work on water
and drainage infrastructure, some of which was a century old.