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Topic: Canal lock

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	Canal - Wikipedia, the free encyclopedia
		Canals are so deeply identified with Venice that many canal cities have been nicknamed "the Venice of..." The city is built on marshy islands, with wooden piles supporting the buildings, so that here it is not so much the waterways which are man-made, as the land.
		The Miraflores Locks on the Panama Canal (2004)
		Canals have found another use in the 21st century, as wayleaves for fibre optic telecommunications networks.
	en.wikipedia.org /wiki/Canal (605 words)

	Canal Lock Encyclopedia @ ParksAndWildlife.com (Parks and Wildlife) (Site not responding. Last check: 2007-11-07)
		The same kind of locks are used on rivers, often in connection with dams (such as mill weirs), since there is generally a difference in water level between the upstream side of a dam and the downstream side.
		However, using a single gate for the lower end of the lock means a very heavy gate as the lower gate is taller than the upper gate, and means the lock has to be longer to accommodate the opening of the wider gate while a boat is in the lock.
		A lock staircase should not be confused with a lock flight, which is a series of locks in close proximity, such as Caen Hill.
	www.parksandwildlife.com /encyclopedia/Canal_lock (2009 words)

	Canal lock at opensource encyclopedia (Site not responding. Last check: 2007-11-07)
		Canal locks are devices on canals that allow changes in water-level such that a water-way can negotiate a hill without recourse to a lengthy detour.
		A canal lock traditionally consists of two pairs of oak or elm gates placed one after the other along a navigable channel of water.
		On some very large canals such as ship canals the locks gates and machinery are too large to be hand operated, and are operated by large scale hydraulic or electrical equipment.
	www.wiki.tatet.com /Canal_lock.html (871 words)

	Schuylkill Canal Association
		Canal locks are a series of gates designed to allow a boat or ship to pass from one level of water to another.
		Here, after a boat has entered the lock and all gates are secured, the downstream sluices open and water flows through them.
		When the water level is equal on either side of the downstream gate, water stops flowing through the sluices; the downstream gate opens, and the boat continues on at the new water level.
	www.schuylkillcanal.com /about/lock.html (114 words)

	New York History Net Featured Sites
		We are fortunate to have someone of his scholarship and skill to record his visions of New York State.
		You may visit his website by clicking on the image of his painting of The Old Erie Canal, Lock 33, St. Johnsville, New York, circa 1895.
		Syracuse University Press is preparing an authoritative encyclopedia of New York State.
	www.nyhistory.com /featured.htm (1459 words)

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