The term CANAL MAKER can be summarized as a DREDGER, which is a seven-letter job description. A dredger is a person or machine that excavates and removes material from the bottom of a body of water, such as a river, lake, or ocean. Dredging is often used to create or maintain navigable waterways, or to construct dams, ports, and other structures. Dredgers use a variety of tools, such as buckets, draglines, and suction pumps, to remove sediment and other materials from the water.