When you pop open the map, there should be a legend on the left side that shows each section with some colors. In case there isn't, here's a brief description of the colors you're interested in:
Burnham Extension is largely white, plus a few small sections of different colors around the Belfast and Moosehead Lake RR crossing that show the various alignments that were proposed.
The bottom-most red piece indicates the Wiscasset yard/shop/wharf area.
The rest of the red pieces indicate the "as-surveyed" alignment, in places where it deviates from the "as-built" alignment:
While working on the Wiscasset to Weeks Mills segment I noticed that there were a couple of locations where the survey and the as-built was off more than it normally is, these deviations in the survey were added as a separate layer to the map to show how the original survey had the line laid out and how it was actually built.
1.) Probably the best known was the route around the Head Tide Church. This included a compound 5 to 3 degree curve south of the church.
2.) The mud flats at Wiscasset.
3.) North Whitefield. The topography tells a different story than the simple tangent in the survey.
Nothing on this map indicates the
current status of the ROW regarding ownership, integrity, etc.
HTH