HDPE pipe solves swamp problem for airport expansion

Problem: 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...