View of an Austin Model #700 Trencher excavating Section 34A of the North Outfall Sewer in Los Angeles, ca.1934

The massive machine is in the middle of a deep trench at center. One long metal arm is reaching down into the trench, while another deposits dirt into a large pile at right.

The walls of the trench are held up by wooden boards, and wooden beams run across the top of the cut. Two men are holding long wooden boards at center as another man shovels dirt at right. Stacks of lumber can be seen at left.