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Researchers combat infrastructure decay

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“It caved in one day before we planned to bring the television truck out to examine it,” Aillet said the day after the event.

He said the city’s sewer system, aged in some areas to its expected 50-year maximum life and as much as 20 years beyond that in some places, suffers similar incidents about twice a year, but the city continues to fight the problem. With 136 miles of pipe, it would take seven years to inspect all of it at the current rate, he said.

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