The master rigger of a 200-ft-high tower crane that collapsed at a midtown Manhattan construction site last March, killing seven workers and civilians, was indicted Jan. 5 on multiple charges of manslaughter, criminally negligent homicide, assault and reckless endangerment. Manhattan District Attorney Robert Morgenthau also said that rigger William Rapetti, 48 and his firm Rapetti Rigging Services Inc., Massapequa, N.Y., failed to file tax returns. Photo: Debra K. Rubin/ENR District Attorney Robert Morgenthau announces indictment of tower crane rigger while Commissioner Rose Gill Hearn (left) noted stricter city crane safety rules. Following his arraignment, also on Jan. 5, Rapetti faces
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.