ULLICO Inc. Related Links: AFL-CIO statement on Death of Mark Ayers Electrical Workers' Union Shows Muscle In Choice for New Building-Trades Chief Laborers Returning to Trades But Total Harmony Still Elusive Trades Vow To Keep Political Status Quo Mark H. Ayers, president of the AFL-CIO's Building and Construction Trades Dept. (BCTD), died suddenly early on April 8 in Washington, D.C., a department spokesman has confirmed. Ayers, who had been in the role since 2007, was 63 years old.No details were released on the cause or circumstances of his death, but according to an industry group official with ties to the
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.