Tunnel depth won’t hurt commerce: city officials
http://www.ottawacitizen.com/Tunnel+depth+hurt+commerce+city+officials/1660165/story.html
BY TIM SHUFELT, THE OTTAWA CITIZENJUNE 3, 2009 11:03 PM
OTTAWA-Although the proposed subway tunnel to be located downtown will have to go deep — around 10-storeys deep — city officials say that will not prevent an “underground city” from developing.
At the heart of the city’s $4-billion light-rail plan is a three-kilometre tunnel stretching from Albert Street near LeBreton Flats to Rideau Street and Sussex Drive, past the University of Ottawa and ending at Lees Station.
Concerns have been raised, however, that obstacles like the foundations of existing buildings will force the tunnel too far underground, making it less accessible and preventing the kind of below-ground commerce found in Montreal and Toronto.
City staff admit that the digging will have to occur up to 30-metres under the surface, mainly so the tunnel clears storm sewers along the Rideau Canal.
“It’s not a difficult thing,” the city’s head of transit planning, Vivi Chi, told the Citizen’s editorial board on Wednesday. “Worldwide, there are deep tunnels all over.”
And if we dig it, the subterranean businesses will come, said deputy city manager Nancy Schepers.
“The depth is not going to have a material impact on that. It will happen over time. (Commercial development) won’t happen at the depth of the station itself, it will be the transition between the station itself and the buildings,” Schepers said.
Going deeper is cheaper, they added, as it would avoid key utilities infrastructure just below the surface and would make for easy boring through the limestone bedrock.
And depth matters when it comes to rider convenience, they said. With enough room for a concourse on top of the subway stations, passengers would be able to access either platform directly after entering the station.
If all goes according to plan, construction of the tunnel will begin in 2012 and it could be operational by 2016. But much needs to happen before then.
The city’s credibility in the rail-construction marketplace is questionable after it reneged on its original rail plan, resulting in a $200-million lawsuit from the Siemens consortium that had won the contract.
However, “getting to the altar and not being able to finish the deal” should not dissuade firms when there’s the prospect of winning a lucrative contract, Schepers said.
Co-operation will also be required to implement the city’s plan, she added. Rights of way will have to be secured from the property owners atop the proposed subway route and approval from the NCC is still needed to locate the light rail route along the Ottawa River Parkway.
“They’re not saying yes, they’re not saying no,” she said.
Regardless of the specific route, however, the NCC will have to be involved, she added. “The federal government has land interests through the entire corridor.”
Other east-west routes are also still on the table, including Carling Avenue and Byron Avenue, she said.
© Copyright (c) The Ottawa Citizen