The Northwest line is already under construction to Arvada, correct? I believe they are working westward right now.
As for the line up to Boulder, blame the expense of building a completely separate right-of-way along the BNSF Brush Subdivision, a very busy funnel for coal trains :-/
As for the line up to Boulder, blame the expense of building a completely separate right-of-way along the BNSF Brush Subdivision, a very busy funnel for coal trains :-/