James W. Poirot, who chaired Denver engineering and construction giant CH2M Hill Cos. Ltd. for a decade and spearheaded an epic, although controversial, project to boost construction quality industry-wide, died Aug. 4 of congestive heart failure. He was 79.While chairman of CH2M Hill in the late 1980s, the longtime quality control advocate also pushed to develop a professional practice quality manual through his involvement in the American Society of Civil Engineers (ASCE). The effort had its roots in the collapse of a hotel walkway in Kansas City in 1981. PoirotThe Poirot-led project involved the coordination of 4,000 contributors and 40
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.