MCNINCH Edwin K. McNinch, a veteran bridge construction engineer and constructibility expert who worked on some of the most technically challenging U.S. spans over a 58-year career, died July 11 in San Mateo, Calif. He was 80. McNinch was president of San Mateo-based EKM Engineering, which he founded in 1987, after a 36-year career with contractor Guy F. Atkinson Co. Projects on which he consulted include the Third Carquinez Strait Bridge in California, Hawaii�s H-3 Viaduct and the I-205 span across Oregon�s Columbia River. �Ed was instrumental in the early adoption and development of prestressed concrete, concrete segmental bridges and
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.