Swing aquaduct enables both barges and larger ships to move freely along Manchester canals.
Barge transporting coal in Manchester canal. Two canals are constructed one on top of another. An aquaduct is seen closing. Several shots of the barges moving along the upper canal - the one which was just closed. After the barges have moved away, the gates are closed. Close up of a man blowing a whistle - signal for revolving aquaduct to open. Several shots of the aquaduct opening and large ship passing through the lower canal.