Keywords: FMIB 33099 View from Cofferdam Showing Lower, Middle and Upper Locks at Gatum, Panama Canal.jpeg View from Cofferdam Showing Lower Middle and Upper Locks at Gatum Panama Canal Subject Panama Canal Panama Locks Hydraulic engineering Geographic Subject Panama--Gatum Tag Panama Canal 1912 Cite book View from Cofferdam Showing Lower Middle and Upper Locks at Gatum Panama Canal Mendville PA Keystone View Company 1912 No 21714 author PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 33099 Cofferdams Panama Canal Zone in the 1910s Gatun Locks Stereo cards of Panama Keystone View Company stereo cards Construction of the Panama Canal |