This is one of those official federal histories that often provide great depth and detail of a topic not well covered elsewhere. It helps to be into dams and dam building, for this is the best book to date on the many New Deal dam projects from the iconic Boulder/Hoover Dam to those built both before and since. There is considerable information on how these monumental structures came to be in an era very diferent from our own. We read of the fascinating people who designed and constructed them, often in places with hellish conditions. Good photos and diagrams supplement the well-researched text. A study this good deserves to be better known--and widely read.