Hi Matt,
Everything narrow gauge in Maine is 2ft. 3ft is considered wide gauge by true mainiacs :-)
The flanger in Bridgton is ex-Bridgton and Saco River (Bridgton and Harrison.) I don't know what its state of restoration is, but the point in moving it to Bridgton was to potentially have a local group of enthusiasts care for it, and see what the community reaction would be to establishing a railroad display there.
-Ed Lecuyer