Concrete Arches, Showing Culvert 18 Feet in Diameter, Pedro Miguel Locks, Panama Canal


Material Information

Concrete Arches, Showing Culvert 18 Feet in Diameter, Pedro Miguel Locks, Panama Canal
Physical Description:
Angrick, Bill ( donor )
Keystone View Company
Place of Publication:
Meadville, PA
Copyright Date:


Subjects / Keywords:
Locks (Hydraulic engineering)   ( fast )
Machinery   ( fast )
Arches   ( fast )
Panama--Panama Canal   ( fast )
Spatial Coverage:
Panama -- Central America -- Panama Canal Zone


A view of the inside of the Pedro Miguel Locks, including its massive concrete arches.
Scope and Content:
B. L. Singley founded The Keystone View Company in 1892 in Meadville, Pennsylvania. The company quickly became the world's largest view company, having at least 250,000 negatives (of which some 50,000 were available as numbered views) by the 1930s. These images were meant to bring international experiences into the palm of the average person's hand, to be revisted in private or during social gatherings. It has been said that the ability of the stereograph to bring vicarious experiences to faraway people makes this medium parallel to the internet or television today. The Keystone View Company also focused on the educational value of their products, employing teams of people to write explanatory texts that were printed on the backs of the stereograph cards. This text, along with the imagery, presents the dominant vision of American ideals and interests during the late nineteenth and early twentieth centuries. Source 1: Source 2:
Gifted on behalf of William P. and Barbara L. Angrick

Record Information

Source Institution:
University of Florida
Holding Location:
Panama Canal Museum Collection at the University of Florid
Rights Management:
Public Domain Presumed (e.g. expiry of copyright term): This item is presumed to be in the public domain. The University of Florida George A. Smathers Libraries respect the intellectual property rights of others and do not claim any copyright interest in this item. Users of this work have responsibility for determining copyright status prior to reusing, publishing or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
Resource Identifier:
accession number - 2013.2.187
System ID:

Full Text

11 _4i1
~F~tf~l ~*-z
nl; ~~i T~m

rr .F I.
*~ .. I.-.R-?.-. ---:.. .:
ct'- ~
~i; ;

1 7.

21711-Concrete Arches, Showing Culvert 18 Feet in Diameter;
Pedro Miguel Locks, Panama Canal.

A system of culverts will be used in filling
and emptying the locks. The larger size cul-
verts, as shown in the picture, where the
area of a cross section is 254 square feet, run
the entire length of the middle and side con-
crete walls, making three of these large cul-
verts in each lock. Their magnitude may be
appreciated when we observe that they are
about the same size as the tunnels built by
the Pennsylvania Railroad under the Hud-
son River.
From each of the three large culverts there

run several smaller ones, about 7 feet in
diameter, which conduct the water undei
the floor, and gain access to the lock cham-
ber through holes in the floor. A cylindri-
cal valve controls the smaller culverts which
communicate from the middle wall with th'
twin chambers. Large valves, near the mitrc
gates, control the large culverts. Water is
fed in both directions by laterals from the
large culvert in the middle wall. This causes
a saving of water by allowing the water to
flow from one twin lock to another.

Copyright 1912, by Keystone View Company.



JA% 2 77