Usually the tower/site/CCs that CBI uses are the same ones that CSP uses. I've even heard CBI come up on CSP Statewide quite a few times. 108 Lookout Mountain is where I've seen CBI the most, as well as 106 Squaw Mtn, and also Cheyenne Mountain down in Colorado Springs.
Same thing for denials. CBI is denied on 120 DTB Denver Metro, 164 Chevron Denver Metro, 150 Methodist Mountain, and most (if not all) Zone 4 sites in El Paso County.