BACHTA Joseph A. Bachta, owner and president of International Bridge & Iron Co., Newington, Conn., who fabricated structural steel for many landmark bridges and buildings in the Northeast, died on Nov. 29, 2010, of cardiac arrest in Hartford, Conn. He was 84. Bachta founded the steel fabricator in 1992 and also served as general manager and assistant to the president of Standard Structural Steel Co., also based there, from 1960 to 1990. Projects on which he worked as fabricator include Boston�s Central Artery/Tunnel; the Trident submarine base in Groton, Conn.; the Thames River bridge in Montville, Conn.; skyscrapers in Manhattan,
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.