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Matt York, Associated Press
This aerial photo shows the collapsed elevated section of Interstate 10, Monday, July 20, 2015, in Desert Center, Calif. All traffic along one of the major highways connecting California and Arizona was blocked indefinitely when the bridge over a desert wash collapsed during a major storm, and the roadway in the opposite direction sustained severe damage.

LOS ANGELES — Inspectors have found erosion under two other highway bridges near the span that collapsed in the Southern California desert, and construction crews are working to reinforce them.

Flash flooding along Interstate 10 on Sunday caused the eastbound side of the span to give way and severely eroded the supports on the westbound side near the town of Desert Center.

The highway has been closed in both directions, severing a vital connection between Los Angeles and Phoenix.

Authorities hope to reopen I-10's westbound lanes to two-way traffic within weeks.

Mike Beauchamp, the local head of construction for the California Department of Transportation, says workers are also shoring up two bridges several miles to the west.