JM Eagle, the world’s largest plastic-pipe manufacturer, on April 5 revised its product warranty from one year to 50 years. The Los Angeles firm, with $1.6 billion in annual sales, says the new warranty will cover manufacturer’s defects for all new sales of high-performance polyvinyl chloride and high-density polyethylene pipe used in water transmission and distribution lines and sewer mains. Two months ago, a federal court unsealed a whistle-blower’s defective-products lawsuit, which has been joined by 43 municipalities and four states.
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.