This illustration appeared on the cover of the July 1995 issue of Hydro Review magazine. The magazine was set to mark the annual Waterpower conference to be held in San Francisco that year. Adorning the iconic Transamerica building with turbine blades seemed an appropriate boast for the event even though they had nothing to do with the event as far as I can recall, and we never did ask the Transamerica people if it was okay to use an image of their building in this way.