Nicor Gas and Cullinan Properties Partner to Power Growth at Rock Run Collection

For 40 years, Cullinan Properties has led the way in real estate development, delivering innovative, community-focused projects across the United States. Their partnership with Nicor Gas has been crucial in bringing to life Rock Run Collection, a 310-acre mixed-use destination in Joliet, Illinois, at the intersection of I-80 and I-55, serving as a gateway to Chicagoland.

The collaboration between Nicor Gas and Cullinan Properties has ensured that Rock Run Collection—a vibrant hub blending retail, entertainment, healthcare, hospitality and multifamily living—has the scalable infrastructure needed to thrive. Nicor Gas’s expertise in extending gas infrastructure across the site supports both current and future tenants, including anchor Hollywood Casino Joliet, and powers over 1 million square feet of planned mixed-use space. This partnership also drives economic growth in Will County, where rising employment and population are anticipated.

Austin West, project manager at Cullinan Properties, highlighted the partnership’s impact: “Working with Nicor Gas was a key part of our success. Their proactive engagement during design and construction helped us align utility planning with site development goals. Nicor Gas’ responsiveness and willingness to find solutions that worked for both sides contributed meaningfully to the success of the first phase and laid the groundwork for future growth.”

The Nicor Gas and Cullinan Properties partnership exemplifies how strategic collaboration, and thoughtful planning can transform vision into reality. With robust infrastructure in place, Rock Run Collection is poised to become a cornerstone of Joliet’s future, where innovation, community and opportunity intersect.