This thread has certainly taken on legs of its own with some wild (underscore on that) speculation. Lets all take a step back and breath some air.
The Pan Am CRISI grant details just were published in ANR&P (perhaps my criticism was heard, it was a very thorough and well constructed piece) so if you can go check it out. Abridged version is they are looking for $21M grant match to their own $21M (their contribute is ~$8M in cash and the rest 'labor and stuff') to rebuild from Waterville to Keag, dubbed the 'Pine Tree Corridor'. Project completion date is 2023.
The project basically installs 37 mile of relay 115# CWR, 40 new turnouts, crossings, bridges, ties, ect, gets them the whole 110 miles from Waterville to Keag up to 25MPH and 286K.
Maybe that'll help Mellon get his taller price?