Descriptive InformationSections include: emergency conservation work - camps and activities, buildings--erection of radio tower, construction of buildings, barns and caches, razing buildings, compound, loading ramps, aerial views of different sections in the park, Mission 66, West Thumb Amphitheater, Mammoth Amphitheater, Canyon Village Opening, Canyon Amphitheater, Canyon Village Dedication, Fishing Bridge Campground, and spike camps. Inclusive dates of creation are 1933-1957.