The Chicago Main Drainage Channel; A Description of the Machinery Used and Methods of Work Adopted in Excavating the 28-Mile Drainage Canal from Chicago to Lockport, Ill (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 Excerpt: ...is stored on the bunk of the.naiu channel, and it is expected that it will be used in bridge piers or retaining walls on other sections. Most of the retaining wall on this section was built to bring the sides of the channel up to grade, the top layer of rock being rotten, and to fill in pockets of soft rock. ures, it will be understood, indicate the capacity of the men loading the skips rather than the capacity of the conveyor to handle the loaded skips, but they are the figures which interest the contractor. What the conveyor might do if the skips were loaded as fast as it could handle them is another thing. The conveyors just described were built by the Hulett-McMyler Mfg. Co., of Clevelond, O., as were also the two high-power derricks on Section 7. An elevation and plan of one of the HulettMcMyler derricks are shown in Fig. 69, and the other is identically the same in construction and operation. The derrick has a single boom 1234 ft. long, properly counterbalanced and mounted on a turntable, the whole being carried by a 20-ft. gage car. The extreme radins of swing of the bucket is 97 ft. Thia derrick has the longest boom of any single-boom s-lf-contained derrick on the canal, Ingersoil-Sergeant 18 x 20 1-2 x 35 in. Duplex Corliss Air Compressor Plant, Section 8. Thk 1ngkrs3llskroeant Dkili. Co., New York, Builders. bnt according to the reports of the Superintendent of Construction the average amount per 10-hour shift since the two conveyors have been at work on Section 7 is 190 cu. yds. This record extends over several months' time. The highest daily record madt tip to Feb. 15, 1895, was 3(17 cu. yds. These fig and. so far as where. we know of, any ever used auy The double-boom self-contained derricks on Section 14 of the Drainage Canal are larger, ...