Herring Weir in Rockport Harbor
A weir is constructed each season by pounding in vertical piles, then crossing the piles with long straight sticks, then filling in vertical branches. When fish swim to the weir leader (the straight part that comes out from shore), they are diverted into the pound, where they swim around in circles. The seine net is set inside the weir to catch the herring.
Weir fishing was practiced by Maine's Natives, and was especially popular further east where big tides made putting a "Fence in the Water" relatively easy.