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2171 7-A 1100-Ton Gate Under Construction, Pedro Miguel Locks, Panama Canal.
To withstand the enormous pressure of
the water in the locks powerful gates are be-
ing constructed. The one shown in the pic-
ture weighs 1100 tons, and the total weight
required for all the gates on the canal will be
57,000 tons. As is readily noticed from this
view, these gates are made of steel. The
gates will be 7 feet in thickness, 65 feet in
length, and their height will vary from 47 to
82 feet. In order to lock through smaller
vessels with a saving of time and water, in-
termediate gates will be constructed in the
Copyright 1912, by Key
locks. These will divide the lo-cks into com-
partments with a length of 400 and 600 feet,
respectively. Less than five percent of the
vessels navigating the high seas are 600 feet
or over in length.
The lower gates at the Pedro Miguel locks
ill open into Miraflores Lake, a small lake
wiLt an area of about two square miles. ThiA
lake will be formed by the backing up of the
water from the neighboring streams by the
concrete dam with spillway on the east side
stone View Company.
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