Norris Dam and powerhouse. Elevator penthouse atop dam which also serves as flagpole base. Elevator serves various levels of operating machinery inside dam. Top of dam is developed as roadway with sidewalks. Note handrail projecting toward sidewalk and toe space in parapet to make enjoyment of view more comfortable. Handrail brackets are hollow and contain lights which illuminate the roadway but avoid glare by the use of reflectors and directional lenses