The U.S. Dept. of Transportation has proposed changes to its requirements for disadvantaged-business enterprises (DBEs), which include firms owned by women and minorities. DOT’s longstanding goal is to have at least 10% of highway and other construction funds go to DBEs. DOT says its plan, published in the Federal Register on May 10, would make it easier for a firm to be certified a DBE in more than one state. The proposal aims to make state agencies more accountable by requiring those that do not meet DBE targets to examine why that happened and come up with ways to achieve
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.