Which are the deepest canal locks in the country?
For comparison, this page lists those non-tidal canal and river locks that have a fall of over 11 feet.
|Lock name||Number||Canal||Depth||Other information|
|Tuel Lane Lock||3/4||Rochdale||19' 8½"||6.00m||manned, new lock replacing two locks|
|Bath Deep Lock||8/9||Kennet and Avon||19' 5"||5.92m||new lock replacing two locks|
|Anthony Lock||77||Rochdale||15' 1½"||4.61m||deepened due to mining subsidence|
|Vinegar Lock||10||Ashton||13' 10"||4.22m||part of the Clayton flight|
|Lemonroyd Lock||Aire and Calder||13' 6"||4.11m||new lock replacing two locks|
|Woodnook Lock||Aire and Calder||13' 6"||4.11m||new lock replacing Altofts and Fairies Hill Locks|
|Etruria Top Lock||40||Trent and Mersey||13' 2"||4.01m||at southern end of T&M summit|
|Marple Locks||1-16||Peak Forest||13' 0½"||3.98m||16 locks, total fall of 209 ft, average 13' 0½" each|
|Clayton Lock||8||Ashton||12' 9"||3.89m||part of the Clayton flight|
|Stourport Broad Locks||Staffordshire and Worcestershire||12' 4"||3.76m||linking Stourport Basin with River Severn, two broad locks, total fall 24' 8", average 12' 4" each|
|Stenson Lock||6||Trent and Mersey||12' 2"||3.71m|
|Somerton Deep Lock||34||Southern Oxford||12' 0"||3.66m|
|Holme Lock||River Trent||12' 0"||3.66m||manned|
|Blowers Green Lock||Stourbridge||12' 0"||3.66m||deepest lock on BCN, replaced two locks|
|York Street Lock||Staffordshire and Worcestershire||12' 0"||3.66m||linking canal with Stourport Basin|
|Appley Lock||91||Leeds and Liverpool||12' 0"||3.66m||parallel to two shallower (now disused) locks|
|Bingley Five Rise||25-29||Leeds and Liverpool||12' 0" each||3.66m||5 locks in a staircase, total rise 60', therefore 12' 0" each lock|
|Kidderminster Lock||Staffordshire and Worcestershire||11' 10"||3.6m|
|Tardebigge Top Lock||58||Worcester and Birmingham||11' 7"||3.53m||replaced an earlier vertical lift - sometimes incorrectly claimed to be 14ft|
|Cholmondeston Lock||1||Middlewich Branch, Shropshire Union||11' 3"||3.43m|
|Hunts Lock||2||River Weaver||11' 2"||3.4m|
|Denham Deep Lock||87||Grand Union Canal South||11' 1"||3.38m|
|Stanthorne Lock||3||Middlewich Branch, Shropshire Union||11' 1"||3.38m|
|Minshull Lock||2||Middlewich Branch, Shropshire Union||11' 0"||3.35m|
|Northgate Locks, Chester||2||Shropshire Union||11' 0"||3.35m||3 locks in a staircase, total rise 33', therefore 11' 0" each lock|
Tuel Lane Lock
On the Manchester Ship Canal, not part of the network available to the casual canal boater, Latchford, Irlam, Barton and Mode Wheel locks each have a fall of 14' 6" (4.41m).
Upper chamber at Ardnacrusha
This page lists deep locks in England, but it is worth mentioning Ardnacrusha in the Republic of Ireland. A dam has been constructed across the River Shannon at Ardnacrusha, as part of a hydro-electric generation scheme. The river navigation bypasses the dam in a canal channel that has a double lock (two-rise lock staircase) with a total fall of 102 feet (31m)! The two chambers each have a fall of around 68 ft and 34 ft. Passage through the double lock can take between 45 and 60 minutes.
The deepest lock in the world is Oskemen Lock, bypassing a hydro-electric dam on the River Ertis in Kazakhstan, with an incredible fall of 138 ft (42m).