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December 25, 2004
Santiago's Line 2 South opens!
On 22 December 2004 President Lagos opened the third and last segment of a line extension program undertaken by Metro Santiago over the last five years. The Line 2 South Extension will add 2.3km of track and two stations to the network of Santiago Metro. The terminal station, La Cisterna at the intersection of Gran Avenida José Miguel Carrera and Américo Vespucio Sur Beltway, two major highways in the south of Santiago, will be the future connection to the western spur the new Line 4, currently under construction. The line extension was designed and constructed in less than five years and the cost for the civil works were slightly below $30 million.
November 22, 2004
Dulles Walkback Tunnel complete!
The d2 “Dulles Development” began in 2000 and passengers have benefited from some of the many planned improvements. One such improvement will open to the public next month.
October 22, 2004
Dr. Gerhard Sauer at Stanford University
On October 20th 2004 Dr. Gerhard Sauer presented a lecture on his article "Tunneling and Beyond" in Prof. Russel Clough's construction management class at Stanford University.
The Audience consisted of graduate students and interested members of the industry.
October 12, 2004
Design Progress at Pittsburgh's North Shore Connector
The Port Authority of Allegheny County is currently undertaking an expansion of the T to the north of the city which includes 3 underground stations and 1 aerial station connected by bored tunnels under the Allegheny River, cut-and-cover tunnels and a mined tunnel using NATM.
The Dr. G. Sauer Corporation, a subconsultant for DMJM+Harris, is responsible for the waterproofing design of all cut-and-cover and mined structures as well as the NATM design of a 440 foot section of double track tunnels south of the proposed Convention Center Station.
September 25, 2004
Success in Returning to Clients Dry Tunnels
We have demonstrated that water leaks in existing tunnels can be controlled to minimize their impact to the function of the tunnel.
September 17, 2004
"On-call" Contracts awarded to DSC in New York
In recent months DSC has been awarded three "On-call" Contracts as a sub-consultant to major engineering firms in the New York area. While one contract is for standard Architectural/Engineering (A/E) "On-call" services for the MTA-NYCT, in which DSC will provide tunnel expertise for various federally funded projects, the other two are focused entirely on security issues.
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.
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!