| 11. | Earth was then excavated from between the inner pair to form the lock chamber.
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| 12. | The north " flight of five " lock chambers still remains as a spill way.
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| 13. | The lock chamber is concrete, with welded structural steel sector gates, and concrete gate bays.
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| 14. | The lock chamber is long and wide, with a minimum draft of at the sill.
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| 15. | More bridges had to be constructed to cross over the channel and the lock chamber.
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| 16. | Barge lock chamber to the right of the gatehouse.
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| 17. | The new lock chambers are wide, long, and deep.
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| 18. | The lock chamber is approximately 56 feet by 275 feet ( 17 by 83 metres ).
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| 19. | There is one lock chamber on the left descending bank of the river at the dam.
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| 20. | It is determined by the water volume in a lock chamber between the levels it handles.
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