n i.. .
-1 kIl;:; l'dqp~~~1Y 1~ ; .r
! !! ,en'..i_-l
I,~Y~a ~or~lI Il !!!II!!!w FI
~ : i5`
At Gatun there are three double locks giv-
ing an elevation of 85 feet. In this picture
we have a good view of the east chamber of
the lowermost lock, with a partial view of the
concrete middle wall. The northern or
lower end i:; shown with its coffer lam,
i which is a watcr-tight enclosure. Beyond
are th" excavating dredges. They are dig-
ging o at a channel, 500 feet wide, which ex-
tends over seven miles to deep water. The
depth is 41 feet or more throughout.
A lake is formed at Gatun by a large dam
which impounds the water from the Chagres
River an. its tributaries. This dam is nearly
1~2 rril"; long, but only 500 feet, or 1 .15 of
its length h, will be exposed to the maximum
85 foot water head. The width of the dam
will vary from almost a half mile at the base
to about 400 feet at the water surface, and
100 feet at its crest. The top of this dam
will be 30 feet above the level of the lake, or
115 feet above the level of the sea.
Ccp3 rgh. Igr2, by K:ystone r'ie Cotilmpany.
r ~. ._ : ... .
21710--East Chamber, Lower Lock, Cofferdam at North and Beyond Two Dredges
at Work Excavating; Gatun. Panama Canal.
I ; Pr 9 ~t r