Plate IV. Lock Canal project
Board of Consulting Engineers Panama Canal - Lock Canal project. Profile of proposed Rock Canal with summit elevation at 60 feet, approved by the Board for comparison. Drawn by Chas. L. Hoopes. Julius Bien & Co. N.Y. (to accompany) Report of Board of Consulting Engineers for Panama Canal, maps and diagrams. (with) Report of Board of Consulting Engineers for Panama Canal. Washington : government Printing Office, 1906.
David RumseyUnited States. Board of Consulting Engineers for Panama Canal
1905
1906
Government Printing Office
1:50 000