File:Collier's new encyclopedia - a loose-leaf and self-revising reference work with 515 illustrations and ninety-six maps (1921) (14774548631).jpg

Identifier: colliersnewencyc03newy (find matches)
Title: Collier's new encyclopedia : a loose-leaf and self-revising reference work ... with 515 illustrations and ninety-six maps
Year: 1921 (1920s)
Authors:
Subjects: Encyclopedias and dictionaries
Publisher: New York : P. F. Collier
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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The hydro-electric development dam ofthe Yadkin river, N. C, contains a dam DAM 252 DAM built of concrete, 1,400 feet long, and 217feet in height. The Noguera Pallaresa River Dam inSpain was built and designed by Ameri-can engineers. It is 330 feet high, 700feet long, has a base width of 230 feet,and is built of concrete. The deep water plans for the Missis-sippi river include the construction ofnumerous dams, and in 1917 Dam No. 1,located near St. Paul, was placed inoperation. It made the river availablefor navigation for 13 miles. In New South Wales the MurrayRiver Dam has been planned as part ofan irrigation project. It will be 3,600feet long, and have both earth and con-crete sections. In 1864 a poorly constructed earthdam at Sheffield, England, went out thefirst time it was put to use, and causeda flood which cost 238 lives. No en-gineer was employed to design the MillRiver Dam at Williamsburg, Mass.,which went out in 1874, with a loss of143 lives, and $1,000,000 in property. The
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ROOSEVELT DAM, ARIZONA The Hetch Hetchy Dam of the SanFrancisco water system will be one ofthe largest masonry dams in the world.The height from foundation base tocrest will be 311 feet. It will be amasonry dam with a straight gravitysection of 600 feet, and will have asiphon spillway. It will be located inthe Tuolumne river 150 miles E. ofSan Francisco. South Fork Dam, owned by the SouthFork Hunting and Fishing Club ofPittsburgh, Pa., was an earth dam of70 feet height. It was designed to havea spillway of 150 feet, but this was notcarried out, and the existing spillwaywas partially blocked with screens,bridge supports, etc., when in May, 1889,excessive rains caused the water to goover the entire length of the dam. The DAMAN 253 DAMASK dam itself was carried away, and floodedthe town of Johnstown, Pa., with a lossof over 2,000 lives and about $4,000,000in property. The Walnut Grove Dam inArizona failed on Feb. 22, 1890. Thisdam was a rock-fill structure, and thefailure was caused by i

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