Project: LDS Conference Center Salt Lake City, Utah Architectural Firm: Olin Partnership, Philadelphia Contractor: American Landscaping Completed: Spring 2000 Quantity: 3200 yd3 Application: Lightweight fill material Geofoam use used to replace heavier soil in planter boxes. Many of these planter boxes were located on the roof where weight was a major concern. Geofoam reduced the weight on the roof by approximately 4,320,000 lbs.