I found the post that I was talking about. It was posted back in Sept about the Farmington Branch and Standard Gauge. In it Bob says -
That is why standard gauge equipment, ie the 490 series engines and MOW equipment like the rotaries clear. (The rotaries can not now go back to Antonito as the floor of Rock Tunnel was raise in the center to improve drainage and prevent ice build-up in the spring. This was done after the D&RGW sold the line.) This was posted on Sept. 12, 2000. I will see if I can link it.
Wow...I was really betting on the bad egg nog.
Duane