Photo courtesy of T.J. Lyons An image of Alice Hamilton (left), alongside a quote from her autobiography, hangs above the author's desk. Above my desk hangs a picture of a woman born in 1869—Alice Hamilton. She is the mother of industrial hygiene and the ultimate safety professional. I recommend that every safety manager read her autobiography, “Exploring the Dangerous Trades,” in which Hamilton details her safety investigations of armament factories in New Jersey, mercury mines in the southwest and lead smelters in Wisconsin. The first poisonings of some good people.In her book Hamilton recounts a conversation with a close friend
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.