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September 01, 2004
Engineering Solution for Transbay Terminal, San Francisco, CA
An engineering study commisioned by the San Francisco Board of Supervisors and prepared by Cordoba/Zurinaga JV, SYSTRA Consulting Inc., Aldaron Inc., Brierley Associates, EnviroTrans Solutions Inc., Engineering and Construction Scheduling Inc. and the Dr. G. Sauer Corp. for the San Francisco County Transportation Authority provides a tunneling solution to a problem that has so far seemed nearly unsolveable:
How to safely build the 51 story 80 Natoma Tower, which is ready to break ground and accomodate the future Transbay terminal access tunnel alignment which, when built, penetrates the tower's foundation.
June 11, 2004
Sound Transit Approves Beacon Hill Contract
The Sound Transit board yesterday approved the biggest contract so far for its Seattle light-rail line: $280 million, plus a $20 million contingency, to dig a one-mile tunnel under Beacon Hill and build two stations.
June 10, 2004
Privatized Dulles Rail Wins DOT Go-Ahead
Six years in the proposing, a plan to build a 23-mile, partly private rail line in northern Virginia got its most significant boost June 10 when the state received the green light from the Federal Transit Administration to begin preliminary engineering. It then signed a contract with Bechtel Corp. and Washington Group International, the project’s joint venture champion. The line, which will connect an existing Washington, D.C., Metro subway line to Dulles International Airport, could cost as much as $4 billion. It is the first rail project pushed under Virginia’s decade-old public-private transportation law and could be a harbinger of how future transit jobs will be achieved as public funds shrink or face delays, observers say. Click here to view chart
May 14, 2004
Breakthrough at Santiago's Linea 4
In May 12, Chile's President Lagos Escobar, with a large crowd of officials and workers, celebrated the breakthrough of the tunnels between Pique Villagra and Plaza Egana Station of Metro's Linea 4.
May 13, 2004
Russia Wharf Tunnel nearing completion
The excavation of the second tube of the binocular tunnel under the historic Russia Wharf Building was finished in February 2004.
With the completion of the waterproofing and the shotcrete final lining, the tunnels are essentially complete!
May 13, 2004
Singapore Tunnel Team May Have Cut Corners
Preparations are beginning for a formal inquiry into the April 20 collapse of a Singapore mass-transit tunnel excavation in which four workers were killed. For the record, all parties on the project are limiting their comments to bland disclaimers, if they are commenting at all. But knowledgeable sources are pointing to price competition engendered by the design-build project delivery as a contributing factor in the accident.
May 06, 2004
Break Through at Russia Wharf
On January 14th, 2004 workers broke through the last mined tunnel section under the historic Russia Wharf Building in Boston, MA.
May 01, 2004
Obayashi Low Bidder for Atlanta West Area CSO
The joint venture of Obayashi/Massana was the apparent low bidder for Atlanta's West Area CSO Storage Tunnel and Pumping Station project. Five prequalified contractors submitted bids for the project, which was divided into two contracts. Bidders could choose to bid either contract, or submit a combined bid.
May 01, 2004
Beacon Hill prequalifiers
Three groups have prequalified for the design-bid-build Beacon Hill underground section of the 14-mile, initial segment of Seattle's Sound Transit LRT.
April 22, 2004
NAT 2004 in Atlanta
From April 17-22, the American Underground Association (AUA) staged the North American Tunneling Conference 2004 in Atlanta. The theme of this year's conference was "Underground Construction - The Sensible Solution to Urban Problems."
AUA gathered an impressive assortment of papers that were presented at the conference which consequently sparked some interesting discussions.