Tuesday, November 27, 2012

Airport tunnel structure poured

The City of Calgary has completed pouring the Airport Trail tunnel structure. The last section of the tunnel was poured on October 30.

The 620-metre long tunnel structure is being constructed to accommodate six lanes of traffic, with the provision for a future transitway, and runs under the new airport runway between Barlow Trail and 36 Street N.E.

“This is another major milestone as we move toward the completion of the Airport Trail tunnel,” said Gordon Stewart, Director of Transportation Infrastructure. “The project managers and work crews have done an outstanding job to meet the tight deadlines.”

The walls and roof of the tunnel shell were poured in sections—50 in total. For each section it took 80 trucks delivering a total of 850 cubic metres of concrete in a 12-hour period. More than 42,000 cubic metres of concrete has been poured on the tunnel structure since the first section was completed earlier this year.

October 31 was a key “turn over” date from The City to the Calgary Airport Authority, allowing the Authority to continue its runway construction. The first portion turned over on August 31 was the section immediately beneath the runway while this second section is under the taxiways that run from the airport to the terminal area.

Along with waterproofing and backfilling the concrete sides of the tunnel walls, other elements that need to be done prior to full completion include electrical and mechanical work, installation of lighting and road construction inside the tunnel.

Most of the work on the roadways will take place in 2013. Airport Trail between Barlow Trail and 36 Street N.E. is expected to open in May 2014.

City Council approved a budget of $294.8 million for the project.

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