The I-25 Santa Fe interchange is one of the busiest urban corridors in downtown Denver. The project consists of a 2,000 foot long, 11 span flyover bridge using curved, spliced, precast post-tensioned concrete U-Girders. Additionally, Hamon designed and constructed both NB and SB I-25 bridges over US 85, and a temporary bridge to carry SB I-25 during the multiple phases of construction. Aggressive scheduling cut the original schedule from 1,209 days to 730 days, minimizing the impact to the over 210,000 vehicle trips per day on this congested interchange. Asphalt and concrete were recycled and re-used on the job, as well as over 100,000 gallons of the 1 million gallons of contaminated construction dewatering that was treated and disposed on the project.
Background
The following improvements took place as part of this $32.1 million project:
Replacement of the existing I-25 bridges over Santa Fe Drive that were in poor condition. Both bridges were originally constructed in 1958.
Construction of a new flyover ramp from northbound Santa Fe Drive to northbound I-25, eliminating the left side on-ramp and improving operations and safety for this major traffic movement.
Reconstruction and realignment of I-25 from the north end of the Broadway viaduct to just south of Alameda Avenue to provide lane continuity. Now complete, there are four lanes on I-25 in each direction through Denver from C-470 to US 36.
Project Benefits
Aggressive scheduling cut the original schedule from 1,209 to 730 days; minimizing impact to the 210,000 vehicle trips per day by 479 days.
The project consisted of a 2,000 foot long, 11 span flyover bridge using curved, spliced, precast post-tensioned concrete U-Girders, in addition to two bridges over highway 85 and one temporary bridge on I-25.
Hamon recycled and reused the asphalt and concrete on the project, as well as over 100,000 gallons of the 1 million gallons of contaminated construction dewatering.
