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1972 Dulles Airport experiment: In 1972, FHWA used 5 inches of scrubber waste in a parking-area base at Washington's Dulles Airport. 2 years later, wet weather caused the experimental base to soften a...

Explore how the Federal Highway Administration's experimental use of FGD scrubber waste at Dulles Airport paved the way for innovative road base materials and successful implementations across several states.