Carlton Bridge

Until August 1, 2000, it also carried two lanes of U.S. Route 1 (US 1) on its upper deck, after which the highway was transferred to the adjoining Sagadahoc Bridge and the road connection severed at the west end.

With the removal of US 1 from the bridge, its primary traffic is freight trains operated by the Central Maine and Quebec Railway that are bound for manufacturers in Thomaston, of which several pass over the bridge per week.

The in-depth inspection found that steel has been rusting away from the bridge and at least one beam needs repair.

Despite the deficiencies found, MaineDOT has stated that the problems do not currently impair the running of trains across the bridge.

No decisions have yet been made about how to address the deficiencies, though options include repainting the bridge, removing the remaining road deck, or even its closure.