Photograph of a view of a dredge excavating a trench in the main ship channel at Los Angeles Harbor for a twenty-inch sewer line, 1933. The dredge is at right and consists of a large crane mounted on a rectangular wooden barge or platform. The crane is reaching out over the water at left where the bucket is holding a full load of mud. A small rowboat is tied to the barge, and it appears that the sludge is being deposited on another platform at left. The crane has a sign on the side that reads: "Merritt, Chapman and Sc[ot]t Corp".