. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 548 THE PANAMA KOUTE FOR A SHIP CANAL. After the coinpletion of all its , and after a careful study of the data disclosed by them, the Commission deemed it advis- able to plan such a dam as would cut ofi' absolutely all possible sub- surface flow or seeimg'e through the sand and gravel below the river surface. It is to be observed that such a subsurface flow might either disturl) the sta))ility of an earth dam or endanger the
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 548 THE PANAMA KOUTE FOR A SHIP CANAL. After the coinpletion of all its , and after a careful study of the data disclosed by them, the Commission deemed it advis- able to plan such a dam as would cut ofi' absolutely all possible sub- surface flow or seeimg'e through the sand and gravel below the river surface. It is to be observed that such a subsurface flow might either disturl) the sta))ility of an earth dam or endanger the water supply of the sununit level of the canal, or both. The plan of dam finally Top^f Dam>, Coffof Dam, Work f • PneiUBatie CiJason Work 1314' '==z^ £leT.+'J2'Lake liobiu futl-^ Elcv.+0. FiDtiSaiid, Gn Little Cla; FiDe 6acid and Ulue CUf / (Jisiel and Sand ( Bloe Clay and ^Sand I Coarse band \ Sand and Cla; Oravel, Sandv Little Blue Cla; Blue Cla; and ^aod Little Cla; ' Sand and Blue Cla; OrnielCrusta witb.^ (Vrllo» Cla; and Sand Blue Cla; and Sand I Sand and Blue Cla; I Blue Cla; and Sand Coarse Sand I Blue Cla; and Sand scaLe of feet —X- — -?-I'MumjUtC Ciisscn \r6rk 0 60 .100 200 300 5554' >v!—Coflfer Dam, Work 246--J^ 34S-- '~J'^eW:7Z7P7yZ^7'Z7:7P;77777P^^^^7Zr7Z^^. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Board of Regents; United States National Museum. Report of the U. S. National Museum; Smithsonian Institution. Report of the Secretary. Washington : Smithsonian Institution
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