multimillion-dollar upgrade to Dunedin International
Airport's runway is like starting a major infrastructure
project each night, chief executive John McCall says.
Work on the $5.3 million project began earlier this month,
and was expected to take six weeks to complete - weather
permitting, he said.
A mobile asphalt plant had been set up at the southern end of
the 1900m runway for use by the 65 Fulton Hogan contractors,
who had come from all over New Zealand to work on the
''Because of the small window to do this - 9.30pm at night to
6am the following morning - the more asphalt we can put down
in a single night the lower the cost is,'' Mr McCall said.
The 24-hour airport would be closed to flights after its last
scheduled flight at 9.10pm and reopen at 6.30am, with work
continuing between those times.
There would be some disruption to NZ Post and other flights,
while medical flights would have to use different airports
during this period.
''It has been something we have been unable to avoid.''
Each night, the old asphalt was milled to provide better
adhesion and strength as preparation for the new layer of
asphalt laid over the top.
''You have to start and stop a major project every night.''
The main runway upgrade includes shape correction as the
runway ''moves over time'', with the rehabilitation work
typically carried out every 10 to 15 years due to aircraft
loads and environmental conditions, he said.
The airport company budgeted for the upgrade and, while it
wanted the work to last 15-years, ''in reality it will most
probably be between 10 and 12''.
Mr McCall said those using the airport would notice little
apart from the temporary plant, but ''if they were really
observant they might see some brand new asphalt laid on the