Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 537
Fig. 1244. depth of arch at spring, 40 ; at key, 36. The piers are 10 feet thick atspringing line ; their up-stream ends are at angles to the main body of thepiers, and parallel to the thread of the stream. The whole length is 2,100 feet,of which there are 3 arches of 40 feet span, 16 of 80 feet,…
Mechanical drawing
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