Utilities up and down the East Coast were rapidly making progress on restoring power to the up to 7.5 million homes and businesses that were reported without electricity after Hurricane Irene struck over the weekend.No major damage was reported at East Coast power plants, but Constellation’s Energy’s Calvert Cliffs nuclear Unit #1 remained shut down after a piece of aluminum siding struck a transformer there. All nuclear plants in the path of the storm continued operating or safely shutdown in advance of the storm, according to reports from the Nuclear Regulatory Commission. Connecticut Light & Power reported having record outages in
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.