Denver, Colorado. Since 1997, AECOM has contributed to a multitude of projects associated with the Stapleton Redevelopment and has led an interdisciplinary team to produce architecture and landscape design guidelines, a major urban park and greenway masterplan and a light rail/commuter rail station area plan, transforming Denver's abandoned 4,700-acre Stapleton Airport, the nation's largest urban infill project, into a mixed-use community with 25,000 residents and 30,000 jobs.