Dirty job: How NASCAR's Bristol Motor Speedway was converted from concrete to clay - Fox News

Bristol Motor Speedway has been converted into a dirt track for the second year in a row and the head of operations, Steve Swift, shares the details on how it was done.

Spring cleaning is coming late to Bristol Motor Speedway again. (David J. Griffin/Icon Sportswire via Getty Images | Jared C. Tilton/Getty Images) For the second year running the half-mile oval in … [+2707 chars]

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