Despite sagging revenue at state and local levels, numerous environmental projects in the U.S. are moving ahead, driven by continued regulatory demands and a growing interest in sustainability. In the water and wastewater market, funding sources began to stabilize this spring as money from the American Recovery and Reinvestment Act helped prop up some plans and financing started to flow through the bond market again. Photo: CH2M Hill CH2M Hill has a $110-million contract for Superfund work in the western U.S., which includes the Iron Mountain site in Redding, Calif. Related Links: The Top 500 Design Firms: How Long Will
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.