This payphone may be found at the City Market gas station south of Granby. It is pretty close to the Ski Granby Ranch. The phone had dial tone, no broken buttons, and rings when called. I was able to call a friend with it.
The phone number is (970) 887-9907.
Let me take a moment to thank The Phone Loosers of America
The phone Phreaking community, whatever may exist, appreciates your contribution.