The book Sketch of the Civil Engineering of North America was written by author David Stevenson Here you can read free online of Sketch of the Civil Engineering of North America book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Sketch of the Civil Engineering of North America a good or bad book?
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Slackwater navigation also occurs at intervals on many of the great lines of canal. About 78 miles of the Eideau Canal, in Canada, are, as formerly noticed, formed in this way, and in the United States it is met with on the Erie, Oswego, Pennsylvania, Frankston, Lycoming, and Lehigh Canals. The works which have been executed in forming most of the water communications in America, however, are not generally of the slackwater kind, but resemble the canals in use in Europe, being, in f 8ict, artif...icial trenches or troughs, with locks to enable vessels to pass from one level to another. The locks are furnished with boom-gates, which are opened and shut by a long lever fixed to the tops of the heel and mitre posts. The sluices by which the water is admitted into the locks are placed in the lower part of the gates. They are in general common hinge-sluices, opened by means of a rod extending to the top of the gates, and worked by a crank handle. The canals of this construction in the United States are so very numerous, and resemble each other so much, that I do not consider it necessary to give a detailed description of the various works which have been executed on all of them, but shall content myself with giving a brief sketch of the Erie Canal, which was the first in America on which the conveyance of passengers was attempted, and is the longest canal in the world regarding which we possess accurate information.
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