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zk) The Small Pilot Tunnel Was Enlarged By Drilling+Blasting. Crews Moved Forward 30 to 36 Feet A Day.JPG
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%20The%20Small%20Pilot%20Tunnel%20Was%20Enlarged%20By%20Drilling%2BBlasting.%20Crews%20Moved%20Forward%2030%20to%2036%20Feet%20A%20Day.JPG "zk) The Small Pilot Tunnel Was Enlarged By Drilling+Blasting. Crews Moved Forward 30 to 36 Feet A Day.JPG")