31. Yellow means that the lock chamber is being emptied or filled to match the level of the approaching vessel. 32. There is one lock chamber on the left descending bank of the river at the dam, wide and long. 33. Interestingly, an equal savings of water, based on the same principle, could be reached by adding more lock chambers . 34. On September 15, 1900, the lock chamber was closed, and the river began to back up behind the dam. 35. About 15 percent of the lock chambers are long, 60 percent are long, and 25 percent are less than long. 36. These facilities include a canal lock museum and three canal lock chambers with a total elevation difference of 10 meters. 37. Pumping ballast water in and out of the caisson is enough to float it up or down the lock chamber . 38. After dredging and infilling behind lock chambers during the winter of 2006-7, the link was re-opened on 6 April 2007. 39. Each lock chamber measured long and wide, and the canal was originally operated manually before it switched to electrical power. 40. The project produced 51 wooden wicket dams and 600 foot by 110 foot lock chambers along the length of the river.
