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An accident involving a semi has closed a portion of U.S. Highway 20 in Black Hawk County.

The crash happened around 7:30 AM Thursday just west of the Hudson Road interchange on the southern edge of Cedar Falls. The accident was causing a traffic back-up. Officials were diverting eastbound traffic onto Ridgeway Avenue at the Grundy Road exit.

At 8:30 AM, the Iowa Department of Transportation was reporting that the highway was still closed.

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