Hurricane Sandy’s impact on the United States was tremendous. The nation’s most heavily populated metropolis experienced electrical power outages, critical supply chain disruptions, and intermittent transportation in the days and weeks after the storm’s landfall. Many critical operations struggled to get diesel fuel to supply their back-up generators. Some experts thought the New York metro area would be immune to such catastrophic critical infrastructure disruptions, so how could the area have mitigated Sandy’s impact? Energy microgrids could have played a part. A microgrid is a small, electric utility than can be disconnected from the larger electrical grid for stand-alone, computer-controlled,
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.