Smithsonian Report. 1935.— Nelson. W. R. 



Plate 9 



1. Hauling First Section of 30' Diameter Penstock Pipe Along Parapet 



Roadway. 



July 20, 1934. 







2. Steel Spiral Casing for 115.000 Horsepower Boulder Power plant 

 Turbine assembled in Shop of Allis Chalmers Manufacturing Co., 

 Milwaukee. Wis. 



May 15, 1935 



