| 41. | The 64-ton wooden caisson ( lifting chamber ) was sealed at each end by guillotine gates, as was the lock chamber.
|
| 42. | The third section is partially hidden by a twentieth century concrete bridge, which carries a minor road over the lock chamber.
|
| 43. | The top part of the lock chamber has sloping banks which are covered by vegetation of various types rather than by turf.
|
| 44. | The lock chamber is 600 feet long, 80 feet wide, and 22 feet deep and can accommodate up to 100 vessels at once.
|
| 45. | When the locks are in stairs, as in the Panama Canal, only the first ( highest ) lock chamber matters for this calculation.
|
| 46. | Essentially, each cycle uses the volume of water discharged by the lock chamber ( its width multiplied by its height and depth ).
|
| 47. | Both environments required the sinking of piles and the provision of paved floors to the lock chambers, neither of which were adequately done.
|
| 48. | Also the large lock chamber allows a large vessels to pass through the lock in a single operation instead of using smaller lock sections.
|
| 49. | Water slices 4 and 5 are emptied into the next lock chamber and " lost " ( as in the original canal locks ).
|
| 50. | They had a " vantelle " ( valve ) controlled by a rack and pinion that allowed the draining of water from the lock chamber.
|
