The airport world marked the latest leg of its journey toward standardizing sustainability this month in Chicago. The Chicago Dept. of Aviation, which is running a $6.6-billion modernization program, has unveiled the latest version of a sustainability manual that now offers specific guidelines and scoring systems for design, construction, operations and maintenance, concessions and tenants at airports. “Say goodbye to the old manual and hello to a new sustainable airport,” says Eugene Peters, director with Ricondo & Associates Inc., a Chicago-based aviation consultant. “This applies to everything...not just what you build but how you built it. Photo: OMP Green Airport
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.