E-470 Toll Road, Segment IV

Denver, Colorado, United States

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AECOM led a joint venture, MKK Constructors, on Segment IV of E-470 – the remaining 12.5-mile, four-lane, controlled-access toll road that skirts the northern edge of the Denver, Colorado, metropolitan area.
The general roadway alignment of Segment IV traverses rolling high prairie terrain and farm ground irrigated by a series of canals and ditches. The roadway skirts several rural housing developments and crosses various streets, country roads, and the major transportation arteries of I-76, US 85, and the Union Pacific Railroad. Wetlands replacement was also included in the project scope. The project was completed five months early and $1.3 million under budget.

AECOM also performed the design-build contract for Segments II and III. Under a separate O&M contract, we operated Segment I of the toll way from 1992 to 1997. With the completion of Segment IV, the entire toll way is in service from I-25 in the north, around the eastern edge of Denver, and back to I-25 in the south, providing motorists with improved access to fast-growing suburban areas and the Denver International Airport. I Interstate 25 runs north and south through the middle of Denver.

Highlights and accomplishments for Segment IV include:

  • A directional interchange with I-25
  • Seven interchanges
  • 43 bridges
  • One mainline and eight ramp toll plazas
  • Over 100 utility relocations
  • 42 acres of wetlands creation and mitigation
  • 415,000 tons of asphalt
  • 233,000 square yards of concrete paving
  • 10,600,000 cubic yards of earthwork
  • State-of-the-art toll collection equipment