A pothole forced SFO to close two of its four runways for about eight hours today, creating a series of delays and cancellations for thousands of passengers.
The 12-inch depression developed where two of the airport's four runways intersect. That forced the closure of runways 28-left and 1-right while repair crews moved in to do a temporary fix.
One passenger we spoke to, says the problem interrupted a trip to Chile for her and five colleagues.
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The pothole was discovered at dawn, ironically in a spot that already had been scheduled for a major repair this fall.
"This is a very heavily trafficked area of our airport, this intersection," said spokesperson Doug Yakel.
"More than two-thirds of the aircraft that operate at SFO will actually use that intersection so that's one of the reasons why we want to make a real fundamental look at this in September," he said.
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Crews focused on repairing the asphalt surface. However, it appears layers of underlying concrete, said to be decades old, are the root of the runway problem.
Depressions are happening at a rate of six to eight times a year. So, officials tell ABC7 News the concrete base will be repaired in September, which will close runway 28-left for 20 days.