Film ID: NEFA 19707 Video of LAUNCH OF DOCK GATE 1966 Visitor TabsDescription Sponsored film by Turners Film Productions that records the launch of a dock gate engineered by Head Wrightson at Thornaby on 15 August 1966. The giant steel structure is floated down the Tees accompanied by the tug Hutton Cross. Head Wrightson prepare to launch a dock gate into the River Tees. The Tees towing Company's Hutton Cross tugboat sails into view. The massive steel gate is launched down slipways and floated downriver accompanied by tugboat. Men watch from the bank of the Tees. Men in rowboats help maneuver the dock gate, tying ropes to tow the structure. General view of the slipways.