2017
SP5968 : Side pond paddles in use on the Watford staircase
taken 7 years ago, near to Watford, West Northamptonshire, England
Side pond paddles in use on the Watford staircase
The red paddle is raised, filling the lower lock from the side pond. Then the white paddle will be raised, emptying the upper lock into the same side pond. When the water is at the same level in both locks, the boat will move from Lock 3 to Lock 4.
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