Giant steam-shovel excavating the Colorado Aqueduct for the Metropolitan Water District on April 10, 1934

Photograph of a giant steam-shovel excavating the Colorado Aqueduct for the Metropolitan Water District, April 10, 1934. The base of the shovel is at right and a man can be sitting near a metal control room. A long metal arm extends from the base past the edge of the image at center. The bucket of the shovel is filled with dirt and can be seen at left over a deep trench. In the background, a tall range of mountains is visible.1934年4月10日，大都会水区（Metropolitan Water District）科罗拉多输水渠（Colorado Aqueduct）施工现场的巨型蒸汽铲挖掘机摄影作品。该挖掘机的基座位于画面右侧，一名男子正坐在金属控制室旁。一根修长的金属机械臂从基座延伸而出，越过画面中央区域的边缘。挖掘机的铲斗满载泥土，在左侧的深沟上方清晰可见。背景中矗立着一列高耸的山脉。