Colorado Hanover Mystery Repeater

In Colorado, along the I-25 corridor south of Denver, there are several buildings that appear (based on various evidence, sometimes only circumstantial) to be telephone cable repeaters. It's hard to sort out their history, as several different long-distance lines have passed through this area over the years, including a transcontinental cable route that I know little about but might be related to this station. This is very much unfinished research and it's a distinct possibility that this building will turn out to have nothing to do with telephones.

This building is particularly notable for its unusual construction, with a flat roof and two slightly different sized sections. I wouldn't tend to think that it's AT&T at all, but I'm not the only person who's suspected it was part of the transcon cable route.