DCHP-1 Online
ice-trap 
n. an engineering technique for slowing down the flow of a river during break-up, involving the dredging of holes into the river bottom so that the ice will build up, forming a barrier.
ice-trap
n. an engineering technique for slowing down the flow of a river during break-up, involving the dredging of holes into the river bottom so that the ice will build up, forming a barrier.
