IH-70 Ramp A
Life-Cycle Engineering Services | EXPANDED

Modjeski and Masters is pleased to announce the acquisition of structural engineering firm Summit Engineering Group, Inc. Our combined engineering prowess and respective technical skillsets will enable us to provide streamlined design and construction solutions to best meet client needs.

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back buttonSegmental Concrete Bridges

I-25 Overpass Reconstruction

| Denver, CO

  • Client:

    Harmon Contractors
  • Service:

    Segmental Concrete Bridges
  • Status:

    In Progress
  • Overview

     I-25 is the primary North/South route across the state of Colorado and is the interstate connection into downtown Denver – the state’s capital city. This stretch of I-25 is heavily travelled, carrying nearly 210,000 vehicles on average. Santa Fe Drive is also a critical North/South connector for Denver serving as the main link to I-25 for those who live and work in the Southwest Denver suburbs. Due to anticipated traffic increases and safety concerns, the Colorado Department of Transportation (CDOT) decided to reconstruct the interchange.

    Working in conjunction with the selected contractor, Hamon Contractors, Summit Engineering Group, Inc. (Summit) provided a contractor-alternate design at bid time that included the redesign of all bridge elements including superstructure, piers, abutments, and foundations. These designs will reduce the number of stages of construction, shorten the schedule, and reduce the impact on existing traffic. Construction Engineering services were also provided including the design of all falsework and temporary structures. Specific services provided include: construction administration, erection engineering, and demolition engineering plans for removal of existing I-25 overpass structures.

    The safety of these structures is paramount to CDOT and the numerous vehicles that travel on or under them every day. Colorado, like many of our clients, trusted us to get it right the first time. And we delivered on our promise: designing great bridges that connect people and their communities.
  • Description

    Tasks Performed
    • Value Engineering
    • Construction Engineering
    • Construction Administration
    • Erection Engineering
    • Demolition Engineering

    Bridge Geometry
    • Length of Main Span – 240 feet
    • Total Project Length – 1,757 feet
    • Lanes on Existing Structure – Eight Lanes
  • Testimonial

    [This project] will directly benefit 290,000 motorists as well as Regional Express Bus passengers who travel this intersection every day. - CDOT Tiger Grant Application
  • Credits

    Gregg A. Reese, PE (Project Principal)
    DeWayne D. Hansen, PE (Project Manager)