US-285 & S Broadway Project

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Project Overview

The US-285 & S. Broadway Interchange Reconstruction project will reconstruct the S. Broadway bridge over 285, the adjacent ramps, and US-285 itself from approximately Bannock St to Sherman St. The project will replace the aging and outdated bridge, improve roadway geometry, and improve pedestrian and bicycle facilities within the interchange.

Project Schedule

The design phase started in December of 2020 and was completed in early 2022. The project was initially advertised for construction in June of 2022 and the bid opening held on July 26, 2022. Due to unexpectedly high bids, construction cannot start until additional funding is identified for the project.

Proposed Improvements

Interchange Configuration

The consultant worked with the City and CDOT to develop and review possible interchange configurations. Ultimately, the analysis resulted in the recommendation and selection of a tight diamond interchange, similar to what exists today. Compared to the existing interchange, the proposed interchange will feature:

  • Improved roadway geometry compared to the existing diamond
  • Improved storage space for northbound left turning traffic
  • Safer crossings with fewer conflicts between pedestrians and traffic at each crossing
  • Provides more accessible greenspace by shifting the ramps closer to US-285
  • Maintains a similar footprint which eliminates the need to acquire private right-of-way

Roadway Geometry Improvements

The new interchange will include 3 through lanes in each direction on US-285, while improving roadway geometry to meet modern standards for driver and pedestrian safety and comfort. The new interchange will modify the curve on US-285 to provide a more predictable and comfortable driver experience. The ramps will be designed to provide softer departure angles. The signalized intersection at US-285 & S. Sherman St will be removed to eliminate hazardous conflicts between US-285 traffic, S. Sherman traffic, and merging traffic to and from S. Broadway. The new geometry at Sherman St will only allow the option of traffic making a right turn from westbound US-285 to northbound Sherman St.


Bridge Replacement

The existing S Broadway bridge over US-285 is over 70 years old and does not meet modern design standards for roadways such as vertical clearances, appropriate lines of sights, and shoulders. This project will replace the outdated and deteriorating structure with a longer bridge to accommodate the additional lanes underneath. The bridge replacement gives the City the opportunity to improve on other sub-standard features on the S Broadway cross-section as well. Such improvements may include: an improved pedestrian and bicycle experience through wider sidewalks and a buffer zone between pedestrian and vehicle traffic, improved aesthetics on a keynote piece of infrastructure in the downtown district, and narrower lanes promoting safer driving as traffic enters the pedestrian dense downtown district.

Retaining Walls

As part of the bridge replacement the existing retaining walls will be removed. The new retaining walls will consist of short, cheap walls arranged in a stepped configuration to make up the elevation difference between US-285 & S. Broadway. In addition to a lower up front cost, these walls are easier to access and maintain, providing cost savings throughout the life-cycle of the new interchange.

Drainage

The additional lanes on US-285 will add more surface run-off that will need to be collected and responsibly discharged into the nearby Little Dry Creek. The proposed storm sewer system has a higher capacity than the existing system and incorporates storm water quality features including rain gardens and hydrodynamic separators.

Multi-Modal

The multi-modal improvements made through this project will be subtle, yet impactful. The types of bicycle and pedestrian facilities will remain primarily the same throughout the project, however, key changes will be made to improve the pedestrian and bicycle experience. The project incorporates the following characteristics to improve bicycle and pedestrian safety and comfort:

  • Wider sidewalks on the S Broadway bridge
  • Buffer zones between pedestrian and vehicle traffic wherever possible
  • Improved overall aesthetic of the interchange
  • Leading pedestrian intervals in the traffic signal phasing
  • Roadway geometry that slows right turning traffic and provides higher pedestrian visibility
  • Pedestrian refuge islands that shorten crossings and reduce the number of conflicts in a giving crosswalk

Aesthetic Improvements

The project will make significant changes to the visual characteristics of the interchange. The new bridge will incorporate prominent gateway features in the form of bookend columns with a large City of Englewood facing US-285 traffic. The bridge and retaining walls will feature colored and textured concrete to further draw attention to the city’s downtown district.


Project Funding

This project has three sources of funding. Federal funds awarded via a grant through the DRCOG Transportation Improvement Program, State Funds, and City of Englewood funds. The funding breakdown is as follows:

$7.6M (Federal Grant) + $3.1M (CDOT) + $4.2M (City of Englewood) = $14.9M

Project Overview

The US-285 & S. Broadway Interchange Reconstruction project will reconstruct the S. Broadway bridge over 285, the adjacent ramps, and US-285 itself from approximately Bannock St to Sherman St. The project will replace the aging and outdated bridge, improve roadway geometry, and improve pedestrian and bicycle facilities within the interchange.

Project Schedule

The design phase started in December of 2020 and was completed in early 2022. The project was initially advertised for construction in June of 2022 and the bid opening held on July 26, 2022. Due to unexpectedly high bids, construction cannot start until additional funding is identified for the project.

Proposed Improvements

Interchange Configuration

The consultant worked with the City and CDOT to develop and review possible interchange configurations. Ultimately, the analysis resulted in the recommendation and selection of a tight diamond interchange, similar to what exists today. Compared to the existing interchange, the proposed interchange will feature:

  • Improved roadway geometry compared to the existing diamond
  • Improved storage space for northbound left turning traffic
  • Safer crossings with fewer conflicts between pedestrians and traffic at each crossing
  • Provides more accessible greenspace by shifting the ramps closer to US-285
  • Maintains a similar footprint which eliminates the need to acquire private right-of-way

Roadway Geometry Improvements

The new interchange will include 3 through lanes in each direction on US-285, while improving roadway geometry to meet modern standards for driver and pedestrian safety and comfort. The new interchange will modify the curve on US-285 to provide a more predictable and comfortable driver experience. The ramps will be designed to provide softer departure angles. The signalized intersection at US-285 & S. Sherman St will be removed to eliminate hazardous conflicts between US-285 traffic, S. Sherman traffic, and merging traffic to and from S. Broadway. The new geometry at Sherman St will only allow the option of traffic making a right turn from westbound US-285 to northbound Sherman St.


Bridge Replacement

The existing S Broadway bridge over US-285 is over 70 years old and does not meet modern design standards for roadways such as vertical clearances, appropriate lines of sights, and shoulders. This project will replace the outdated and deteriorating structure with a longer bridge to accommodate the additional lanes underneath. The bridge replacement gives the City the opportunity to improve on other sub-standard features on the S Broadway cross-section as well. Such improvements may include: an improved pedestrian and bicycle experience through wider sidewalks and a buffer zone between pedestrian and vehicle traffic, improved aesthetics on a keynote piece of infrastructure in the downtown district, and narrower lanes promoting safer driving as traffic enters the pedestrian dense downtown district.

Retaining Walls

As part of the bridge replacement the existing retaining walls will be removed. The new retaining walls will consist of short, cheap walls arranged in a stepped configuration to make up the elevation difference between US-285 & S. Broadway. In addition to a lower up front cost, these walls are easier to access and maintain, providing cost savings throughout the life-cycle of the new interchange.

Drainage

The additional lanes on US-285 will add more surface run-off that will need to be collected and responsibly discharged into the nearby Little Dry Creek. The proposed storm sewer system has a higher capacity than the existing system and incorporates storm water quality features including rain gardens and hydrodynamic separators.

Multi-Modal

The multi-modal improvements made through this project will be subtle, yet impactful. The types of bicycle and pedestrian facilities will remain primarily the same throughout the project, however, key changes will be made to improve the pedestrian and bicycle experience. The project incorporates the following characteristics to improve bicycle and pedestrian safety and comfort:

  • Wider sidewalks on the S Broadway bridge
  • Buffer zones between pedestrian and vehicle traffic wherever possible
  • Improved overall aesthetic of the interchange
  • Leading pedestrian intervals in the traffic signal phasing
  • Roadway geometry that slows right turning traffic and provides higher pedestrian visibility
  • Pedestrian refuge islands that shorten crossings and reduce the number of conflicts in a giving crosswalk

Aesthetic Improvements

The project will make significant changes to the visual characteristics of the interchange. The new bridge will incorporate prominent gateway features in the form of bookend columns with a large City of Englewood facing US-285 traffic. The bridge and retaining walls will feature colored and textured concrete to further draw attention to the city’s downtown district.


Project Funding

This project has three sources of funding. Federal funds awarded via a grant through the DRCOG Transportation Improvement Program, State Funds, and City of Englewood funds. The funding breakdown is as follows:

$7.6M (Federal Grant) + $3.1M (CDOT) + $4.2M (City of Englewood) = $14.9M

  • Virtual Public Meeting #3 on October 28

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    Hey Englewood,

    The City will be hosting the third Public Information Meeting for the US-285 & S. Broadway Interchange Reconstruction Project. This meeting will update the public on the design progress and provide an opportunity for members of the community to ask questions about the project. The meeting will be hosted virtually at 6 p.m. on Thursday, October 28, 2021.

    More information on how to access the meeting will be sent out to the project email list and posted on the project webpage before the meeting.

    Best,
    Englewood Public Works

  • 9.2.2021 Project Update

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    supporting image

    US-285 & S. Broadway Users,

    This is the eighth in a series of monthly updates regarding the US-285 & S. Broadway Interchange Reconstruction Project.

    In the last month, the consultant team worked to refine the structural design, the grading design, the drainage design, and more. The landscape designers began working on final designs and details for the aesthetic features of the interchange.

    In the coming month, the team will look to finalize the roadway alignment and elevations and continue refining the structural design, grading design, and drainage design.

    Best,
    Englewood Public Works

  • 8.2.21 Project Update

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    US-285 & S. Broadway Users,

    This is the seventh in a series of monthly updates regarding the US-285 & S. Broadway Interchange Reconstruction Project.

    In the last month, the consultant team submitted the preliminary design package to the city and CDOT. Both agencies are reviewing the package prior to proceeding with the final design phase. City staff met with city council to determine the direction of the major aesthetic characteristics of the interchange. The selected design includes large bookend columns at the corners of the bridge with the Englewood logo prominently featured on the faces visible from US-285.

    In the coming month, the team will need to incorporate comments received from the city and CDOT, while beginning to refine the plans and specifications to a higher level of detail.

    Best,
    Englewood Public Works

    View of proposed S Broadway bridge looking East from US-285.
    Preliminary Drawing, may not reflect final design.

    Aerial view of proposed interchange.
    Preliminary Drawing, may not reflect final design.


  • 7.1.21 Project Update

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    US-285 & S. Broadway Users,

    This email is the sixth in a series of monthly updates regarding the US-285 & S. Broadway Interchange Reconstruction Project.

    In the last month, the project team determined the most suitable bridge structure design based on the characteristics of the interchange and relative cost of the available structure types. The final structure will be a two-span bridge using precast concrete tub-girders. The team also refined the roadway geometry and established preliminary limits of reconstruction. The team developed preliminary grading plans and drainage plans. The team continues working with city staff to narrow down aesthetic concepts for the interchange.

    In the coming month, the team will be submitting a preliminary design package to the city and CDOT for review.

    Best,
    Englewood Public Works

    Preliminary Design; may not reflect Final Design

    Preliminary Design; may not reflect Final Design

  • 6.1.21 Project Update

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    supporting image

    US-285 & S. Broadway Users,

    This email is the fifth in a series of monthly updates regarding the US-285 & S. Broadway Interchange Reconstruction Project.

    In the last month, the project team continued working towards environmental clearance and refining the interchange geometry. The team has arrived at a preferred alternative for the interchange configuration and began developing a plan for how to phase traffic during the construction of the bridge. This phasing plan involves reducing Broadway to 1 lane in each direction, eliminating the southbound-to-eastbound left turn, and setting up a detour for the eliminated movement. The team developed landscaping & aesthetics concept designs and is working with City staff to select and refine the preferred concepts.

    The team also hosted the second public information meeting for the project on Thursday, May 27th at 6 P.M. A recording of this meeting can be found on the City’s YouTube channel and is linked on the project webpage.

    Best,

    Englewood Public Works

  • 5.27.21 Meeting Reminder

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    Hey Englewood,

    This is a friendly reminder that the City will be hosting the second Public Information Meeting for the US-285 & S Broadway Project tonight, via Zoom Meetings. Please join us at 6 P.M. to hear about the progress of the design and ask questions of design team.

    Use the link below to access the meeting through the Zoom App or on your web browser:

    https://englewoodco.zoom.us/j/99610946757

    Or One tap mobile:

    +17209289299,,99610946757# US (Denver)
    8884754499,,99610946757# US Toll-free

    Or join by phone:

    Dial(for higher quality, dial a number based on your current location):
    US: +1 720 928 9299 or 888 475 4499 (Toll Free) or 877 853 5257 (Toll Free)
    Webinar ID: 996 1094 6757
    International numbers available: https://englewoodco.zoom.us/u/abb2Fj8YlT

    We look forward to sharing more information on this project with you tonight.

    Best,
    Englewood Public Works


  • Virtual Meeting Link for May 27, 2021

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    Hey Englewood,

    On Thursday May 27, 2021, the City will host the second Public Information Meeting for the US-285 & S. Broadway Interchange project. Please join us to learn more about the project and offer feedback on the direction of the design. This meeting will be hosted virtually using Zoom at 6pm.

    Please use the link below to access the meeting:
    https://englewoodco.zoom.us/j/99610946757

    Or One tap mobile:

    • +17209289299,,99610946757# US (Denver)
    • 8884754499,,99610946757# US Toll-free

    Or join by phone:

    Dial (for higher quality, dial a number based on your current location):

    • US: +1 720 928 9299 or 888 475 4499 (Toll Free) or 877 853 5257 (Toll Free)

    Webinar ID: 996 1094 6757
    International numbers available: https://englewoodco.zoom.us/u/abb2Fj8YlT


  • 5.3.21 Project Update

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    US-285 & S. Broadway Users,
    This is the fourth update in a series of monthly updates regarding the US-285 & S. Broadway Interchange Reconstruction Project.
    In the last month, the project team continued work towards environmental clearance, continued refining the interchange geometry, began developing aesthetic and landscaping concepts, began the structure type selection process, continued developing the subsurface utilities map, reviewed and refined the traffic study with CDOT staff, and began developing drainage and water quality concepts.
    Going forward, the team will prepare for and conduct the second public information meeting. The team will determine the preferred interchange alternative and preferred structure type. The team will begin preparing the preliminary design documents for review and approval by the City and CDOT.
    Lastly, this is a reminder that the second public information meeting will be hosted by the City on May 27th at 6pm. More information will be provided in future emails and on the project webpage at: https://www.engaged.englewoodco.gov/us-285-s-broadway...
    Best,
    Englewood Public Works


  • 4.27.21 Virtual Public Meeting #2 Announcement

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    Hey Englewood,

    The City will be hosting the second Public Information Meeting for the US-285 & S Broadway Interchange. This meeting will update the public on the design progress and provide an opportunity for members of the community to ask questions of the project team. The meeting will be hosted virtually at 6pm on Thursday May 27th, 2021.

    More information on how to access the meeting will be sent out to the project email list and posted here shortly before the meeting.

    Best,

    Englewood Public Works



  • 4.1.21 Project Update

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    US-285 & S. Broadway Users,

    This email is the third update in a series of monthly updates regarding the US-285 & S. Broadway Interchange Reconstruction Project.

    In the last month, the project team continued work on establishing existing conditions and obtaining environmental clearance while also beginning work on refining the interchange geometry. The geotechnical team completed analysis of the bridge soil borings and provided recommended foundation and retaining wall types to the structures team. The traffic team has submitted a draft traffic analysis report for review and approval by the City and CDOT. The environmental team has conducted their historic review and is working with CDOT and the State Historic Preservation Office to obtain clearance. The project team began developing the alternative screening matrix to evaluate which interchange configuration best satisfies the goals and constraints of the project. Mapping of the subsurface utilities in the project area continued.

    Going forward, the team plans to refine the geometric layouts of the interchange alternatives and select which alternative to proceed with in final design. The team will look to begin developing conceptual designs for the aesthetic details of the bridge and surrounding landscaping. The environmental team will gather field data for the noise analysis portion of the environmental review. The structures team will begin developing a structure selection report to determine the most suitable bridge and retaining wall types. As the recommended alternative becomes clear, the drainage team will begin developing drainage and water quality designs.

    Lastly, the City recently launched an online public engagement platform called Englewood Engaged which features the US-285 & S Broadway Project. We encourage anyone who’s interested in this project to register for Englewood Engaged and use the platform to stay connected and up to date on the project. The platform offers a central location for general project information, past project updates, related documents, and schedule information. Furthermore, the project team may solicit public input through online surveys conducted on the Englewood Engaged platform.

    Thank you for your continued interest in the US-285 & S Broadway Project.

    Best,
    Englewood Public Works


Page last updated: 07 Sep 2023, 09:47 AM