A "bear-trap dam" is a type of dam that is known for trapping floating debris, such as logs, branches, and other materials. Synonyms for this type of dam might include "debris dam," "log dam," or "blockade dam," all of which convey the idea that the dam is built specifically to prevent debris from flowing downstream. Another possible synonym might be "junk dam," which is a term sometimes used to refer to dams that are made from discarded materials, such as old tires or scrap metal. Regardless of the name used, bear-trap dams can be highly effective at controlling the flow of water in rivers, streams, and other bodies of water.