Staircase locks :: Shared Description

In a staircase the upper gate of one lock is also the lower gate of the one above it. Operating a staircase is very different from operating a flight. It can be more useful to think of a staircase as a single lock with intermediate levels. As there is no intermediate pound, a chamber can only be filled by emptying the one above, or emptied by filling the one below; thus the whole staircase has to be full of water (except for the bottom chamber) before a boat starts to ascend, or empty (except for the top chamber) before a boat starts to descend. In an apparent staircase the chambers still have common gates, but the water does not pass directly from one chamber to the next, going instead via side ponds. This means it is not necessary to ensure that the flight is full or empty before starting. Examples of real staircases are Bingley and Grindley Brook. Examples of apparent staircase locks are Foxton Locks and Watford Locks on the Leicester Branch of the Grand Union.
by Jo Turner
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54 images use this description. Preview sample shown below:

SP5968 : Lock No 3 at the Watford staircase in Northamptonshire by Roger  Kidd
SO8691 : Staffordshire and Worcestershire Canal at Botterham Locks by Roger  Kidd
SJ5759 : Bunbury Locks by Stephen McKay
SP5968 : Watford staircase locks in Northamptonshire by Roger  Kidd
SP5968 : In the Watford staircase locks, Northamptonshire by Roger  Kidd
SJ3631 : Frankton locks, Montgomery Canal by Christopher Hilton
SJ3631 : Frankton locks, Montgomery Canal by Christopher Hilton
SJ5242 : Grindley Brook staircase lock 3 Llangollen Canal by Jo Turner
SJ5242 : Grindley Brook staircase locks (detail) in Shropshire by Roger  Kidd
SO8691 : Narrowboat "Fly" at Botterham Locks, Staffordshire by Roger  Kidd
SJ5242 : Grindley Brook staircase locks  in Shropshire by Roger  Kidd
SP5968 : Staircase locks near Watford in Northamptonshire by Roger  Kidd
SJ5759 : Bunbury staircase locks Shropshire Union Canal by Jo Turner
SP5968 : Watford Locks in Northamptonshire by Roger  Kidd
SJ4066 : How boats can pass in staircase locks by Jo Turner
SP5968 : In the Watford staircase locks, Northamptonshire by Roger  Kidd
SJ5759 : Bunbury Lock Bridge, Shropshire Union Canal by Stephen McKay
SP5968 : Lock No 4 at the Watford staircase in Northamptonshire by Roger  Kidd
SO8691 : Botterham Locks north of Swindon, Staffordshire by Roger  Kidd
SJ3631 : Frankton locks, Montgomery Canal by Christopher Hilton
SO8691 : Botterham Locks north of Swindon, Staffordshire by Roger  Kidd
SJ5242 : Grindley Brook Lock No 3 in Shropshire by Roger  Kidd
SJ5242 : Grindley Brook Staircase Lock No 3, Shropshire by Roger  Kidd
SP5968 : Watford Lock 6 Grand Union Canal Leicester Section by Jo Turner
SP5968 : Watford top Lock in Northamptonshire by Roger  Kidd

... and 29 more images.

These Shared Descriptions are common to multiple images. For example, you can create a generic description for an object shown in a photo, and reuse the description on all photos of the object. All descriptions are public and shared between contributors, i.e. you can reuse a description created by others, just as they can use yours.
Created: Sun, 4 Nov 2012, Updated: Sun, 4 Nov 2012

The 'Shared Description' text on this page is Copyright 2012 Jo Turner, however it is specifically licensed so that contributors can reuse it on their own images without restriction.

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