Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 930
Bear Valley Arched Masonry Bam, California. This receives a sufficient support from the arch-action, and has stood since 1884. Itslength at top is 270 ft., and its radius of curvature is 355 ft. At the centre the deviationof the dam from a straight line is about 27 ft., this being the versed sine…
Mechanical drawing
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