A quick video of Bingley 5 Rise Locks ,it has 5 chambers which are about 14ft or 4.3 metres wide.These are seperated by 6 Solid green oak gates which weigh over 5 Tonnes.They are split in halve so are about 7 feet or 2.1 metre wide ,so when they close they form a watertight seal .Water pressure on the uphill side of the gate keeps it tightly closed, until the water pressure on both sides ,equalizes when the gate can be opened ,.and the boat can move to the next chamber.The five -rise is the steepest flight of locks in the UK,with a gradient of about 1:5 (a rise of about 59 feet (18. metres) over a distance of 320 feet (98 metres).

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