Congressional Edition Volume 6116

Congressional Edition Volume 6116

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...of buoy supports for the curtains, piles were driven at an inclination and in pairs like the letter A. At first a log waling was placed from bent to bent, to which the curtain was attached. Later wire ropes were used. Bents were spaced 25 to 30 feet, and a pile added about every 200 feet, forming a tripod. This was introduced at Nebraska City, Nebr., in 1879 (Annual Report Chief of Engineers, 1880, par. 5, p. 1431), and was used at St. Charles, Mo., in 1881. (Annual Report Chief of Engineers, 1882, p. 1677.) Plate III, figure 8. Screen dike with tripod support.--This dike consists of a wire screen anchored on the bottom and supported on a wire rope suspended from pole tripods. The screen was similar to those used in the floating dikes. The tripods were made of hardwood poles about 6 inches diameter at butts, securoly wired to a base of poles, forming an equilateral triangle. The tripods were anchored by attaching nets, holding nearly a yard of rock, to each leg of the tripod. (Annual Report Chief of Engineers, 1881, par. 2, p. 1608.) This dike was built in the spring of 1881 at Cedar City, Mo. Plate IV, figure 9. Bar dike.--This dike differs from the one shown in figure 8 only in its support and in the method of construction. A number of the supports shown in the sketch were set on a bar about 20 feet apart, over which a cable was stretched to hang the wire net. The net was 25 feet wide, similar to the screens previously described, and was anchored with rocks at the lower edge. It was used near Nebraska City, Nebr., in 1881. (Annual Report Chief of Engineers, 1882, p. 1707.) Plate V, figure 10. Pile dike screened with wire netting.--Dike consists of two rows of vertical piles 14 feet apart in each direction, with one longitudinal wale and...
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Product details

  • Paperback | 216 pages
  • 189 x 246 x 12mm | 395g
  • United States
  • English
  • black & white illustrations
  • 1236756134
  • 9781236756138