Demolition crews are set to remove thefirst major component of the 90-year-old Memorial Bridge betweenMaine and New Hampshire. Workers plan to remove the 2-million-pound lift span on Tuesday.It’ll be disconnected from supporting cables and lowered onto abarge. The Coast Guard has shut down river traffic around the site inthe Piscataqua River to facilitate the project. Over the coming months, workers will continue to dismantle theold U.S. 1 bridge that connects Kittery, Maine, and Portsmouth,N.H. A new bridge is expected to open in July 2013.