S Skyway Watertank

After a little online research I discovered there were 4 providers here. Cingular Blue and Orange, T-Mobile, and Qwest(now probably Verizon)

Also, Clearwire has an application pending to add 4 panels to the tank for their Wi-Max service.

Can you confirm that the (ex-)Qwest equipment is now in use by Verizon?

No I can't. I'll have to wait until they finish construction around the base of the tank before I can get in and take a peek at the Equip Cabs.
It's either Verizon or Sprint, since they each aquired some of Qwest's sites in this market.

In my market(which is an ex-Qwest market as well), Sprint took over a few sites here and there, but the ones that weren't taken by Sprint are still inactive to this date. On an American Tower site, Verizon has added their equipment(a site where Qwest was prior to that), but that's the only site I've seen Verizon do something with former Qwest infrastructure in my area.

Yeah, Verizon bought the Qwest sites that they did to increase capacity in this area.(according to the FCC Doc's) But they didn't buy them all. I know Sprint is using some of them. I guess some of them may be inactive here as well.