Smithsonian Report, 1935.— Nelson, W. R 



PLATE 1 



1. LOOKING UPSTREAM THROUGH BLACK CANYON TOWARD DAM SITE. 



Copy of photograph taken in 1922. 



2. LOOKING DOWNSTREAM TOWARD DAM SITE FROM LOWER SLOPE OF UPPER 



COFFERDAM. 



Base of Nevada intake towers e.xcavation seen in upper right. December 31, 1932. 



