Ключевые слова: arch, architecture, bridge, built structure, city, city area, city light, city urban, color image, columbia river, connect shore, connection, diminishing perspective, drawbridge, engineering, group of objects, heavy, highway, horizon, horizontal, industrial, interstate, liftbridge, metal, metal bridge, night, no people, northwest, object, oregon, outdoors, panorama, portland, powerful, reflection, river, riveted, road bridge, side view, spectacular, structures, supports, transportation, transportation object, truss, urban, urban scene, washington,