The Chicago electrical handbook: being a guide for visitors from abroad attending the International electrical congress, St. Louis, Mo., September, 1904 (Google eBook)

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Pub. under the auspices of the American institute of electrical engineers, 1904 - Technology & Engineering - 203 pages
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Page 156 - ... windage basin," in which large vessels may be turned around. The controlling works are located on this section. These works will consist of gates or movable dams, by which the flow of water from the main channel into the tail race, which is to deliver the outflow into the Desplaines River can be controlled. This river below Lockport follows the trough of the valley down a steep declivity to the canal basin in Joliet. The fluctuations in Lake Michigan by varying slope of water surface, will be...
Page 155 - Chicago, pending the completion of the work necessary for carrying the entire flood waters of the Desplaines through Joliet. This spillway is a concrete dam capped with cut stone, and its wings faced with stone masonry; it is 397 feet long and its crest is...
Page 153 - Glacial drift shall comprise the top soil, earth, muck, sand, gravel, clay, hardpan, boulders, fragmentary rock displaced from its original bed, and any other material that overlies the bed rock. Solid rock shall comprise all rock found in its original bed, even though it may be so loosened from the adjacent underlying rock that it can be removed without blasting.
Page 159 - ... miles. As the plans for controlling works have not been finally adopted by the Board of Trustees, they cannot now be discussed. The total amount of excavation involved in the construction of the main channel is 26,077,765 cubic yards of glacial drift, and 12,071,668 cubic yards of solid rock, or an aggregate of 38,149,433 cubic yards to which must be added the material excavated from the river diversion: glacial drift, 1,564,403 cubic yards; solid rock, 258,926 cubic yards; total river diversion,...
Page 155 - About 13 miles of new river channel had to be excavated with the location of the Main Drainage channel, and about 19 miles of levee built to divorce the waters of the Desplaines watershed from the channel which is to receive the waters of Lake Michigan, and pass them on to the Mississippi River, via the Lower Desplaines and Illinois Rivers. The width of the river diversion channel on the bottom is 200 feet, side slopes 1J to 1, grade generally 0-12 feet per 1,000 feet.
Page 155 - The narrow channel provides for a flow 300,000 cubic feet per minute, or for about the present population of Chicago. The enlargement of the narrow channel can be made by the easier methods of excavation, such as dredging, whenever the needs of the city require it. The grade throughout the lettered sections is 1 ft.
Page 160 - Robey street, about 6 miles. Length of main channel, Robey street to controlling works at Lockport, 28.05 miles. Dimensions : Robey street to Summit, 7.8 miles, 110 feet wide at bottom, 198 feet wide at water line, with minimum depth of water, 22 feet. Summit to Willow Springs, 5.3 miles, 202 feet wide at bottom, 290 feet wide at water line, with 22 feet depth of water; at Willow Springs the channel narrows to the walled and rock cross section, extending 14.95 miles to Lockport, 160 feet wide at...
Page 155 - At the head of this river diversion it was necessary to provide a safety valve in the form of a spillway to allow surplus water to flow toward Chicago, because arrangements have not as yet been perfected for carrying the entire flood waters of the Desplaines through Joliet. ' This spillway is a concrete dam capped with cut stone, and its wings faced with stone masonry; it is 397 ft.
Page 153 - During some seasons its whole discharge would pass through a 6-inch pipe, and at others its volume reaches 800,000 cubic feet per minute. Then it rolls majestically along, flooding the whole valley. Such being the situation, control of this stream was a condition precedent to the successful prosecution of the work upon the main channel. This control has been secured by the outlay of nearly $1,000,000 in constructing what is known as the River Diversion channel. " About 13 miles of new river channel...
Page 153 - The sections from 1 to 14 were put under contract in July, 1892; those from A to F were put under contract late in 1892 and early in 1893; and those from G to M, inclusive, were contracted for in December, 1893. Sections N and O were put under contract May 2d, and Section 15, August 27th, 1894. Earth was first broken on "Shovel Day," September 3, 1892, on the rock cut below Lemont.

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