An infusion of $220 million in American Recovery and Reinvestment Act funding is letting the U.S. section of the International Boundary and Water Commission accelerate work on 170 miles of levees of the Rio Grande flood control system in Texas and New Mexico. The El Paso, Texas-based commission says the work will improve flood protection for more than two million U.S. residents. El Paso, Texas Photo: International Boundary and Water Longhorn Excavators is one of the first contractors out of the gate to upgrade levees along the lower Rio Grande River in Texas and New Mexico. Related Links: Stimulus: 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.