ere are 2,800 miles of canals.
Of the American canals : —
The James River and Kanawha, 147 miles long, overcomes the greatest grade, having a lift of 1,916 feet.
The Morris and Essex, 101 miles long, overcomes a grade of 1,674 feet, accomplished by 29 locks and 22 inclined planes.
The Erie, by DeWitt Clinton, is the longest, 363 miles, with 84 locks.
The Erie Canal was commenced in 1817, and completed in 1825.
The main line leading from Albany, on the Hudson, to Buffalo, on Lake Erie, measures 363 miles in length, and cost about $7,200,000. The Champlain, Oswego, Chemung, Cayuga, and Crooked Lake Canals, and some others, join the main line, and, including these branch canals, it measures 543 miles in length, and cost upwards of $11,500,000. This canal was originally 40 feet in breadth at the water-line, 28 feet at the bottom, and 4 feet in depth.
Its dimensions proved too small for the extensive trade which it had to support, and the depth of water was increased to 7