Photo courtesy of Indianapolis Dept. of Public Works Treatment plant is set for completion next year; deep tunnel is set for a 2017 completion. One month after awarding a $25-million sewerage-tunnel construction inspection contract amid a packed field of proposals, Indianapolis utility Citizens Energy Group will select a firm to build the $275-million project, with the low bidder 33% below the estimate.On Sept. 29, AECOM Technology Corp. was awarded the inspection contract for the Deep Rock sewage overflow project. The Los Angeles-based firm bested competitors that included Parsons Brinckerhoff's Water Group, locally based American Structurepoint, Burgess & Niple and a
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.