. The railroad and engineering journal . oubled in the dryest season. At one end of the dam a channel ft. wide is pro-vided for overflowing water. At the end of the dam alsoa watchmans house and storehouse are erected. The dam itself, which at both ends is strongly anchoredto the hill-side, is built ol well-mixed clay and sand wellrammed together, the mixture being about 66 per cent, ofsand and 34 per cent, of clay. Its total length is 1,432 ft. ;width at the lop, ft. ; at the bottom, in the deepestpart, f- ; he greatest height is ft., and thecubic contents of the dam are
. The railroad and engineering journal . oubled in the dryest season. At one end of the dam a channel ft. wide is pro-vided for overflowing water. At the end of the dam alsoa watchmans house and storehouse are erected. The dam itself, which at both ends is strongly anchoredto the hill-side, is built ol well-mixed clay and sand wellrammed together, the mixture being about 66 per cent, ofsand and 34 per cent, of clay. Its total length is 1,432 ft. ;width at the lop, ft. ; at the bottom, in the deepestpart, f- ; he greatest height is ft., and thecubic contents of the dam are about 168,700 cub. slope of the dam on the water side is faced withmasonry work 1,64 ft. thick, which is built upon a bed ofbroken stone and concrete and which rise, as shown infig. 2, at an angle cf 45° in steps ft. in height brokenby fiat berms or treads ft. in width. The outer sideof the dam, which is built with a slope of i : , is notfaced, but to a height of some ft. from the bottom is Fig. 1. LeICREUSOT. planted with acacias. The lop of the dam, which is above the highest level of the water, is faced with stone,which is a continuation of the masonry work on the innerside, and across the top runs a wall ft. in height. On the water side, lor the whole length of the dam, runsa bed of masonry about 5 ft. in depth upon which the bot-tom ol the facing masonry rests, and which is carried below the surface of the ground. Before building thismasonry, or beginning the construction of the dam, theground was carefully cleared off to the rock, and in addi-tion two trenches ft. in depth were carried the wholelength of the dam in order to provide a better connectionbetween the ground and the dam itself. The clay for the dam was laid in layers 4 in. thick, andthen rolled down hard with steam and horse rollers. Inbuilding it was found that with a steam roller weighingabout 5 tons, about 650 cub. yds. could be rolled in a dayswork. The c
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
