. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 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^
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. 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^^. I'rofilc (if Bohio dam site, selected fur plans and estimate, with section of dam. adopted by the Commission for the purposes of its estim'ates is shown by the accompanying plans and sections. A heavy core wall of con- crete masonry extends from bed rock across the entire geological valley to the top of the structure, or to an elevation of 100 feet above sea level, thus absolutely closing the entire valley against any possible flow. The tliickness of this wall at the bottom is 30 feet, but at an elevation of 30 feet below sea level its sides begfin to batter at such a. 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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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
