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21729-Gatun Dam, Panama Canal.
The subject of this panorama is the Gatun The dam is about half a mile wide at its
Dam, a very small portion of which is visible base. 1The two outer sides of solid material
in the foreground. he Gatun Dam is a were filled in with a watertight hydraulic
large earth structure, nearly a nile and a core, composed of sand and earth sucked up
half in length; in fact, it is really a s il b}- dredges from the Chagres river-bed. The
mountain rijge which fills up the gap in the upper sid and top of the dam were thor-
hills lying along the Atlantic Cast at thi: roughly rip-rapped. About 21,000,000 cubic
point. Thus the lower end of the Chagres yards of material were necessary in the con-
Valley will be filled in and the Chagres struction of the dam.
River, with its tributaries, will be forced to The width of the dam tapers down to 400
form, a large lake, whose overflow outlet feet at the water surface and to 100 feet at
will be at the Gatun Spillway (see view its crest which is 20 feet above the lake
21761). level. The dam will be 105 feet high.
Copyright, 1913, by The Keystone View Company.