SP5968 : Staircase locks near Watford in Northamptonshire

taken 8 years ago, near to Watford, Northamptonshire, Great Britain

Staircase locks near Watford in Northamptonshire
Staircase locks near Watford in Northamptonshire
Grand Union Canal (Leicester Section).
The Watford flight of locks in Northamptonshire contains seven locks, including one staircase of four. The total rise (or fall) in water level provided is 52ft 6in (16 metres).

This image shows the staircase (Locks 6,5,4 and 3), looking south. Chambers are full, awaiting boats which will be descending shortly. beyond the staircase are two more single locks. A queue of boats is waiting there for permission to start their progress up the flight.
Jim Shead's article is worth a read: LinkExternal link

Jo Turner gives this interesting summary:
Staircase locks

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.

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SP5968, 201 images   (more nearby search)
Photographer
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Date Taken
Thursday, 22 August, 2013   (more nearby)
Submitted
Sunday, 5 August, 2018
Geographical Context
Canals 
Subject Location
OSGB36: geotagged! SP 5929 6880 [10m precision]
WGS84: 52:18.8469N 1:7.9014W
Camera Location
OSGB36: geotagged! SP 5929 6883
View Direction
SOUTH (about 180 degrees)
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