Specifications include, but are not limited to: Alaska Railroad (ARRC) forces will prepare the track structure for removal prior to the contractor beginning work, and replace the track structure at the conclusion of work. Contractor will be responsible for lifting track panels out of the track structure and back into the track structure. ARRC forces will additionally install a temporary road crossing, if required, in the track to facilitate contractor access. The successful bidder will be responsible for the permitting and diversion of Rabbit Slough around the work area. Next working pads (contractor to supply fill material) will have to be created to support construction activities). The existing track structure will have to be removed (lifting it as a single piece), and then excavating and removing the existing pipe. The existing pipe becomes property of the Contractor, who is responsible for removing it from ARRC property. The new pipe will require welding and trimming prior to installation as it is in two each 33’ pieces currently. All welds shall meet American Welding Association (AWS) D1.1 Structural welding- steel specification.