Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 143
The upstream facing is of granite rubble well bonded to the hearting. The downstream facing is of heavy ashlar. The stretchers have a minimum depth of 2 ft., a minimum length of 3 ft. and a rise of from 18 in. to 24 in. The headers, which were placed alternately between every two stretchers in each… … Low-Crest Portion of Main Dam. Fig. 2. long. Toe stones are very heavy, being at least 4 ft. long, 4 ft. deep and 3.5 ft. on face. The foundation ledge was so seamy that the original plans of cut-off trench could not be strictly followed; it was usually somewhat wider, with the downstream face…
Engineering
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