Related Links: Q & A With Federal Railroad Administration Deputy Administrator Karen Rae Since July, the Federal Railroad Administration has pushed to obligate more than $2 billion for high-speed rail, most of it provided by the 2009 stimulus act and, since then, awarded to states and Amtrak. Obligations are a key milestone. Karen Rae, FRA deputy administrator, says, “It basically clears the way for project delivery, ranging from environmental [studies], preliminary engineering, final design and, in many cases, construction.” Industry firms welcome the new work because markets are tough and nearly all other American Recovery and Reinvestment Act infrastructure aid
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.