Boston: Stone & Webster Engineering Corporation, .
First Edition. 7" x 9", oblong. 19 pp, in stapled wrappers illustrated with an image of the spillway. Moderate general handling wear, one staple loosening; very good.
Stone & Webster Engineering was hired by the United Missouri River Power Company to construct a new hydroelectric dam on the Missouri River just north of Helena, Montana to replace one that had catastrophically failed in 1908, only a year after it was completed. The eight text pages in this book provide a readable explanation of the causes of the first dam's failure, the engineering challenges posed in constructing the new dam (which including digging out hundreds of tons of steel and concrete detritus from the first one), and how these were addressed to produce the structure that began operation on May 20, 1911 and is still in use today. This is followed by twelve captioned illustrations from photographs, including a double-page panorama showing the old dam, the construction process, and the new dam in operation. 6 copies located in OCLC.