Baltimore just reopened an 1895 tunnel with its floor dug two feet deeper, 1,188 ten-ton concrete slabs laid by a crane bolted to a railcar over 233 straight days, because raising a brick roof that holds up downtown was never an option – Autonocion.com

Baltimore just reopened an 1895 tunnel with its floor dug two feet deeper, 1,188 ten-ton concrete slabs laid by a crane bolted to a railcar over 233 straight days, because raising a brick roof that holds up downtown was never an option