Indiana highway built with foundry sand in 1996 shows durability, low environmental risk

A 275-meter section of State Road 26 in Indiana, constructed in 1996 using foundry sand waste, has been analyzed by researchers for structural performance and environmental impact. The study indicates the material performed well over decades, with minimal leaching concerns, supporting recycling of industrial byproducts in road construction. This is a retrospective assessment, not a new event, but it informs future infrastructure material policy.