HDPE pipe solves swamp problem for airport expansionProblem: Building the 3,300-foot-long, east-west runway at Grand Forks International Airport in North Dakota required that swampland around it be properly drained because it could not support any load.Solution: Ulteig Engineers designed the drainage system using 18- to 60-inch-diameter pipe connected in a herringbone pattern in cover ranging from 4 to 5 feet. More than 3.5 miles of MEGA GREEN corrugated high-density polyethylene pipe made with a minimum of 40 percent recycled content was specified. The pipe from Advanced Drainage Systems has a pre-drilled perforation pattern that allows groundwater to enter the system
