Trash-hauling craft are vessels used to transport waste and debris from one location to another. Two common types of trash-hauling craft are barges and scows. Barges are large, flat-bottomed boats that are usually pushed or towed by a tugboat. Scows are shallow-draft vessels with flat bottoms and squared-off bows and sterns. They are typically used for hauling bulk materials such as sand, gravel, and trash.