Operate dredge to remove sand, gravel, or other materials from lakes, rivers, or streams; and to excavate and maintain navigable channels in waterways.

Direct or assist workers placing shore anchors and cables, laying additional pipes from dredges to shore, and pumping water from pontoons. Lower anchor poles to verify depths of excavations, using winches, or scan depth gauges to determine depths of excavations. Move levers to position dredges for excavation, to engage hydraulic pumps, to raise and lower suction booms, and to control rotation of cutterheads. Pump water to clear machinery pipelines. Start and stop engines to operate equipment. Start power winches that draw in or let out cables to change positions of dredges, or pull in and let out cables manually.

Mechanical -- Knowledge of machines and tools, including their designs, uses, repair, and maintenance.

Operation and Control -- Controlling operations of equipment or systems. Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly. Speaking -- Talking to others to convey information effectively.

Control Precision -- The ability to quickly and repeatedly adjust the controls of a machine or a vehicle to exact positions.

Controlling Machines and Processes -- Using either control mechanisms or direct physical activity to operate machines or processes (not including computers or vehicles). Handling and Moving Objects -- Using hands and arms in handling, installing, positioning, and moving materials, and manipulating things. Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Performing General Physical Activities -- Performing physical activities that require considerable use of your arms and legs and moving your whole body, such as climbing, lifting, balancing, walking, stooping, and handling of materials. Coordinating the Work and Activities of Others -- Getting members of a group to work together to accomplish tasks. Communicating with Supervisors, Peers, or Subordinates -- Providing information to supervisors, co-workers, and subordinates by telephone, in written form, e-mail, or in person. Operating Vehicles, Mechanized Devices, or Equipment -- Running, maneuvering, navigating, or driving vehicles or mechanized equipment, such as forklifts, passenger vehicles, aircraft, or water craft. Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources.