As of July 6th 2009
Tunnel is 4656 meters (15,275 feet) long
with no roof line over-break
average 20 -21 metres per day
Wow, just smokin'! Wish I knew whether it was into the sandstone yet
Monday, July 6, 2009
Niagara TBM on the Sandstone Autobahn
Wow, just smokin'! Wish I knew whether it was into the sandstone yet
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