Don't do something right and 44 years later, it will bite you.
A 66" water main that broke in December and sent a river of water down River Road in Bethesda Maryland, washing cars down the road in two to three feet of rushing water, ruptured because it was installed against jagged rock 44 years ago, instead of on a layer of gravel, as it should have been, according to a consultant's analysis released on May
A four-foot tear was found in the part of the pipe that had been laid against the rock.
The Washington Suburban Sanitary Commission has 5500 miles of water pipes and serves 1.8 million people in Montgomery and Prince George's Counties.
Paraphrased from the Washington Post, May 21, page B1.