Stephen M. Levin was a physician, noted construction occupational illness researcher and co-director of the pioneering Irving J. Selikoff Center for Occupational and Environmental Medicine at New York City's Mount Sinai School of Medicine. LevinBut as a carpenter's son, he also could communicate with craft workers and warned of on-site health risks they faced after the 9/11 attack and for decades before. Some 32 years of research and advocacy ended on Feb. 7 with Levin's death from cancer in Rockland County, N.Y. He was 70."To be very honest, I think Dr. Levin was the first one to identify or suspect
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.