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2. Lock (water navigation) - Wikipedia

   en.wikipedia.org/wiki/Lock_(water_navigation)

   A gate is opened to allow a boat to enter or leave the chamber; when closed, the gate is watertight. A set of lock gear to empty or fill the chamber as required. This is usually a simple valve (traditionally, a flat panel (paddle) lifted by manually winding a rack and pinion mechanism) which allows water to drain into or out of the chamber. [ 11 ]

3. Caisson (lock gate) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(lock_gate)

   A caisson is a form of lock gate. It consists of a large floating iron or steel box. This can be flooded to seat the caisson in the opening of the dock to close it, or pumped dry to float it and allow it to be towed clear of the dock. Graving docks at Birkenhead, closed by a variety of ship caissons and floating (sliding) caissons.

4. Caisson lock - Wikipedia

   en.wikipedia.org/wiki/Caisson_lock

   Caisson lock. The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower ...

5. Caisson (engineering) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(engineering)

   Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.

6. MOSE - Wikipedia

   en.wikipedia.org/wiki/MOSE

   The gates consist of metal box-type structures 20 metres (66 ft) wide for all rows, with a length varying between 18.5 and 29 metres (61 and 95 ft) and from 3.6 to 5 metres (12 to 16 ft) thick. The gates are connected to the concrete housing structures with hinges, the technological heart of the system, which allow the gates to move while ...

7. Wey and Godalming Navigations - Wikipedia

   en.wikipedia.org/wiki/Wey_and_Godalming_Navigations

   Metal piling was erected around the weir to allow work to proceed and the emptied stretch of the river refilled to restore the navigation. Refilling started on 15 June 2020 and by the end of the week the navigation was passable by boats once again. [20] The opportunity was taken to install new sluice gates and a pre-planned fish ladder. As of ...