Related Links: Expert: Seam Failure May be to Blame for Mayflower Oil Spill INFOGRAPHIC 13 Oil Spills in 30 Days The ExxonMobil pipeline that ruptured in Mayflower, Ark., has now been removed and sent to an independent lab for third-party testing while cleanup of the 5,000-barrel spill continues.The 52-ft section of the Pegasus pipeline was lifted out April 15 but the cause of the spill remains under investigation, according to ExxonMobil. It is not known when the pipe testing will be completed.The pipeline had a 22-ft.-long, 2-in.-wide gash, according to Arkansas Attorney General Dustin McDaniel. His office has launched an
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.