Page 74 - 2023 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

The reduction in GHG emissions is a direct result of the new plant requiring 10% less natural gas per ton of asphalt
produced, said Senior Environmental Engineer Paul Schultz. While designers of the old plant attempted to reduce PM
emissions and waste, the technology used in the new plant is far more effective, he added.

“Baghouse fines were introduced into the mix with the old asphalt plant, but the method to reuse the fines created
fugitive emissions,” Schultz said. “The new plant uses a closed system to send baghouse fines back into the drum, which
significantly reduces the fugitive emissions associated with the process.”

In addition to being far cleaner, the new plant is also allowing the Eden Prairie team to be more efficient. Since the new
plant’s installation, the crew has also seen a significant reduction in required maintenance.
The upgrade, which includes improved silos and a new loading system, is also improving the overall customer experience,
Schultz said, noting that load times have also been reduced.

Focused on conservation, the Eden Prairie crew has repurposed much of the old plant’s equipment, turning part of its
grounds into an asphalt and concrete recycling center that produces reclaimed aggregate products.

Site leaders said the recycling effort extends the life of the area’s mined material and decreases the need for fresh mining.

Seen here, Eden Prairie MN’s new batch plant helped the site conserve an
estimated 425,000 kwh, enough to power 30-35 local homes for a full year.

72 2023 SUSTAINABILITY REPORT