3393 x 5100 px | 28,7 x 43,2 cm | 11,3 x 17 inches | 300dpi
Data acquisizione:
2013
Ubicazione:
Ottawa, Canada
Altre informazioni:
A lock is a device for raising and lowering boats between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself (usually then called a caisson) that rises and falls. Locks are used to make a river more easily navigable, or to allow a canal to take a reasonably direct line across land that is not level. The Rideau Canal, also known as the Rideau Waterway, connects the city of Ottawa, Ontario, Canada, on the Ottawa River to the city of Kingston, Ontario, on Lake Ontario. It is 200km in length. The canal system uses sections of major rivers, including the Rideau and the Cataraqui, as well as some lakes. The Rideau Waterway is governed by Parks Canada under the Canadian Heritage Rivers System. The canal was opened in 1832 as a precaution in case of war with the United States. It remains in use today primarily for pleasure boating, with most of its original structures intact, operated by Parks Canada. The locks on the system open for navigation in mid-May and close in mid-October. It is the oldest continuously operated canal system in North America, and in 2007 it was registered as a UNESCO World Heritage Site.
