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Article: United States: Engineering a new Pittsburgh route.
- Article from:
- TendersInfo
- Article date:
- June 17, 2008
CopyrightCOPYRIGHT 2008 Al Bawaba (Middle East) Ltd. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Byline: pinto03
Viewed from its starting point, the new Port Authority tunnel looks like an ivory umbilical cord beneath the Allegheny River.
How much new life it will nourish between downtown Pittsburgh and the North Shore remains to be seen, but there is no doubt its engineering progress has been impressive.
This first of two 2,240-foot transit tunnels has passed the halfway mark as a $10 million German boring machine chews its way through 35 to 45 feet of soft rock each day, 25 feet below the riverbed.
Early this month, the tunnel had progressed more than 1,300 feet from its launch pit near PNC Park, and Port Authority officials ...