Gaping Reminders of Aging and Crumbling Pipes

After a sinkhole swallowed a sewer-repair truck in Portland, Oregon, on the day after Christmas, the truck’s crew crawled to safety, muddy and mystified.

Last summer in Irving, Tex., a 2-year-old boy disappeared near a sinkhole. One theory was that he was kidnapped. Another was that he was lost in the sewer system that had broken open and caused the collapse.

In December, firefighters in Brooklyn rescued a grandmother carrying groceries who fell into a hole that opened beneath her on a sidewalk. And in Hershey, Pa., a damaged storm drain caused a six-foot-deep sinkhole in Chocolate Town Park, nearly sinking the town’s New Year’s Eve celebration.

Local and state officials across the country say thousands of miles of century-old underground water and sewer lines are springing leaks, eroding and — in extreme cases — causing the ground above them to collapse. Though there is no master tally of sinkholes, there is consensus among civil engineers and water experts that things are getting worse.

The Environmental Protection Agency has projected that unless cities invest more to repair and replace their water and sewer systems, nearly half of the water system pipes in the United States will be in poor, very poor or “life elapsed” status by 2020.

from the NY Times