In 1990, Wisconsin used up to 20,000 tons of foundry sand in a highway project; by 2002, a contract called for 80,000 tons for Highway 10

• Waupaca Foundry participated in a University of Wisconsin-Madison research study examining whether used foundry sand could be reused in road projects.
• Sand from Waupaca and two other foundries was tested for potential environmental impacts, including contaminants in pore