Quote:
Originally Posted by volguus zildrohar
The pertinent issue is this:
There is so, so, SO much more underneath Philadelphia to be concerned about than there is under Seattle, possibly other than fault lines. Any figure less than $10 billion is ludicrous and less than $8 billion is shysty.
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Seattle is a mix bag of soft earth , solid rock and water table pockets its no walk in the park. Those Tunnels are also built to withstand an 8.0 Earthquake. If you factor in the Extension up to Northgate its 6 miles of Underground tunnel through all sorts of rock. Philly is more of a solid rock similar to NYC with some soft areas near the River. 6 Billion max for the Philly Tunnel and should take no longer then 5 years to bore...
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