Photo courtesy of Vermont Agency of Transportation Hoping to restore roads before winter snow arrives, National Guard troops help fix three miles of state road in Cavendish, Vermont. Related Links: Hurricane Irene Provides a Laboratory For Testing Bridge Innovations Before winter arrives, crews are working hard in the Northeast to assess and repair infrastructure damaged from tropical storms Irene and Lee in August and September, respectively.Vermont was hit hard by Irene. The storm killed five, closed roads, bridges and rail lines, shut down the state office complex in Waterbury and left more than 50,000 people without power.Dept. of Transportation officials
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.