Ключевые слова: america, arch, archgravity, arizona, blue, bridge, canyon, carl hayden, colorado, colorado river, concrete, construction, copy space, dam, desert, destination, electricity, energy, engineering, glen, glen canyon, hydro, industry, lake, landmark, landscape, no people, nobody, page, powell, power, reservoir, river, scenic, sky, southwest, technology, travel, usa, utah, visitor, visitor centre, water,