If you read the article, you know that you cannot put more than one trunk system in a bank. And yes, the 245, being a 20 plus year old scanner, has several limitations, not the least of which is the fact that it doesn't support PL or DCS - and here's the glossary entries for these terms, in case you don't understand what that means...
Continuous Tone-Coded Squelch System - The RadioReference Wiki
(PL is a Motorola term for Private Line - what we know as the much longer moniker of CTCSS)
DCS - The RadioReference Wiki
This is our database for San Miguel County Colorado
San Miguel County, Colorado (CO) Scanner Frequencies and Radio Frequency Reference
These frequencies are not trunked; they are conventional in nature. And you cannot receive the Colorado DTRS on a 245 - this requires a digital trunktracker, such as the 396T, 396XT, 996T, 996XT or Home Patrol (Unidens). The Mountain Village system cannot be trunked at all with any scanner, but you could listen to the system by programming their frequencies as you would any conventional frequency
HTH...Mike