Even as the rivers of Middle and West Tennessee are returning to their pre-flood levels, damage estimates are rising rapidly. Nashville Mayor Karl Dean (D) on May 11 raised the damage estimate for the city to $1.56 billion, with 99% of the private sector having been inspected. Absent from the total are public buildings and infrastructure damaged by torrential rain that fell on May 1 and 2. Photo: Aerial Innovations of Tennessee PSC Metals Inc.’s recycling facility southeast of downtown Nashville sits submerged in floodwater after the Cumberland River overflowed its banks. David Penn, director of the Business and Economic
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.