Grand Canyon National Park (Coconino County, Arizona)
Personnel installing the metal rings around redwood penstock that provides water to the power plant. Pipe was built out of tongue and groove red wood material held together by metal rod rings that were threaded to be tightened to keep the wood...
Grand Canyon National Park (Coconino County, Arizona); Roads--Design and construction
Construction on the road to North Rim of the Grand Canyon in the valley south of Jacob's Lake and east of V.T. Park Tourist Ranch. Carrying building materials for the construction of the Grand Canyon Lodge