Ключевые слова: america, arizona, boulder, bridge, built, canyon, clock, colorado, concrete, construction, dam, desert, electric, electricity, energy, engineering, environment, generator, high, hydro, hydroelectric, industry, intake towers, lake, lake mead, landmark, landscape, mountain, nature, nevada, outdoors, power, river, rocks, scenic, structure, technology, time, tourism, towers, usa, view, water,