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21728-Looking Across the Wicket Girders of the Emergency Dam. Catun, Panama Canal.
.We see here the wicket girders of the
emergency dam described in the two preced-
ing views (numbers 21725, 21727). 'iie
dam of which this is a part is in reality a
framework which can be quickly lowered
into the locks, and upon which can be
quickly built across the locks an iron wall
consisting of metal plates fitted closely to-
gether. The question is how is this iron
wall to be built across the locks when per-
haps a gate has broken and the current is
rapidly flowing thru the lock?
When the bridge is swung across the lock
the water will be rushing parallel with the
girders, or from right to left of the picture.
Immediately these wicket girders, hinged
to the main bridge at points toward the left
but farther than can be seen in the picture,
will be let down until their ends touch the
floor of the lock, fitting into a pocket pre-
pared for them. The girders thus placed
now form runways for the metal plates
which are run down at right angles tof the
girders, making a dam ten feet high. When
these are in place another series of metallic
plates is let down. This continues until
the dam reaches the desired height.
Copyright 1r13, by The Keystone View Company.
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