Project: Parleys Canyon Bike Trail Salt Lake City, Utah Engineering Firm: EWP Engineering on Salt Lake City Completed: Fall 1999 Quantity: 150 yd3 Geofoam was used to reduce weight on a water utility and to stablize a slope that had previously failed. This slope had been widened to allow a bike trail to be constructed along the top of the slope. The bike trail runs along the side of I-80.