gas line over the colorado river at topock gorge

arch arched architecture arizona bottom boulders bridge cable cables california canyon colorado cross crossing desert desolate engineer engineering eroded erosion forces gas geologic geological geology gold golden gorge gravel gravelly hike landscape line lonely mountain mountains natural nature needles nevada peace peaceful pipe piping plateau remote river rock rocks rocky sand scene scenery scenic shore shoreline slick slickrock southwest southwestern stone stream structural structure structures support suspension topock towers usa valley view water west western wide wilderness