This will obviously not help you in your general search, but I can relate ONE very personal experiance with a 500 foot radio transmission tower.
In 1965 the KNX radio tower in Hawthorne, California (Los Angeles) went down in the parking lot of the radio station. It fell when teenagers cut through one of the guys with a hacksaw!!! When the guy broke, the tower jumped out of it's base socket , cleared the building, and landed in the parking lot about 100 feet from where it started. As it fell, it coiled about itself ( no major section fell very far away from the initial point of impact)clearing the buildng completely.
After we cleaned up the mess, and after the insurance investigations, the original 500 foot tower, along with a companion 400+ foot tower was rebuilt. This was done in July ,1966 by the Pacific Crane & Rigging Co. along with members of the Ironworkers Local 433 of Los Angeles (including myself).
The amazing thing to me was the way it fell, in a coil straight down. That and the fact that the kid that cut the cable wasn't killed.
PC&R are out of buisness now, but the company that absorbed them (MAACO) may still have the photos, it was quite spectacular.
Rod