bear-trap dam

1 definition found

bear-trap dam - Collaborative International Dictionary of English v.0.48 :

  Bear-trap dam \Bear"-trap` dam\ (Engin.)
     A kind of movable dam, in one form consisting of two leaves
     resting against each other at the top when raised and folding
     down one over the other when lowered, for deepening shallow
     parts in a river.
     [Webster 1913 Suppl.]