 The tunnel boring machine was built in Germany and had to be re-assembled in Florida after arriving in crates on the  cargo ship Combi Dock 1 on Thursday, June 23, 2011, and being assembled in the median of the causeway where the construction is taking place.Both directions of the MacArthur Causeway have remained open during the assembly of the machine except for nighttime lane closures and delays on the westbound side.The machine, which weighs more than 2,500 tons, was assembled in a deep pit known as the launching pad located in between two concrete walls in the median of the causeway, which only left a cutter visible from the road.