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30th and Colorado Underpass

Project Update

The 30th & Colorado Underpass project is in the advanced preparation stage, with the team working diligently to complete the final design and funding package, obtain final property acquisitions and ensure the groundwork is laid for a successful project groundbreaking. This work also includes utility relocation activities, which are currently taking place in the field and are expected to continue through Spring 2020. For the latest travel impacts information, visit www.BoulderConeZones.net.  

We anticipate the project will be advertised for a construction bid in spring 2020, with construction beginning summer 2020. Construction duration is estimated to be about 18 months, concluding in early 2022. 

To stay up-to-date on the project, be sure to sign up for the project email list.      

Project Background

The 30th & Colorado Bike and Pedestrian Underpass project will provide important safety, accessibility, mobility and drainage improvements to the intersection of 30th Street and Colorado Avenue. The project area is an important piece of the 30th & Colorado travel corridor for the Boulder community and the University of Colorado Boulder (CU). The existing intersection and at-grade crossings support high frequency transit service, provide important commuting connections for vehicle travel and connect the CU Boulder main and east campuses.

Today, the Average Daily Traffic through the project intersection ranges from 9,000 to almost 10,000 vehicles on Colorado Avenue and just over 21,000 vehicles on 30th Street. Each day, about 1,450 pedestrians and bicyclists (combined) pass through the 30th & Colorado intersection and more than 1,250 riders board and exit RTD and CU buses using the four stops at this intersection.

The Safe Streets Report (2016) found the 30th & Colorado intersection to be a top collision location within the city's street network, with 86 collisions occurring between 2012-2016, one involving a pedestrian and 18 involving a bicyclist. Additionally, the existing on-street bicycle facilities contribute to a high level of stress for some users, leading some bicyclists to ride on the sidewalks to navigate to and through this intersection. Bikes on sidewalks and in crosswalks moving against vehicle travel were indicated as a bicycle collision trend in the Safe Streets Report.

Looking to the future, the Boulder Valley Comprehensive Plan and the University of Colorado East Campus Master Plan forecast growth in the project area, which is expected to result in more people traveling through this intersection. The 30th & Colorado Underpass project will eliminate a barrier for university and community travel needs in this changing landscape.

Project Scope

The 30th & Colorado Underpass project will:

  • Provide a safer, more accessible and more efficient crossing of 30th & Colorado for those traveling through the intersection on a typical day: 
    • 30,000 vehicles
    • 1,450 pedestrians and bicyclists, and
    • 1,250 transit riders
  • Support the current and anticipated increased travel between CU's main and east campuses
  • Implement the 30th & Colorado Corridors Study final design options

Project Improvements

  • Construct two pedestrian and bicycle underpasses at 30th Street and Colorado Avenue
  • Construct a protected intersection
    • The intersection design may change if lessons learned from protected intersections constructed elsewhere in the city, state and nation demonstrate reason for concern
  • Implement the 30th & Colorado Corridors Study preferred alignments at the intersection
  • Connect to existing sidewalks, bike lanes and multi-use paths
  • Reconstruct or relocate existing transit stops
  • Evaluate traffic signal operations for potential changes
  • Install underpass lighting, landscaping and other urban design features
  • Incorporate public art
  • Review potential for a multi-use path connection to College Avenue

Funding

The total project cost is estimated at $15.5 million, with $10.25 million to be secured through a combination of city and CU funds and $4.75 million in federal Transportation Improvements Program  (TIP) funds approved by the Denver Regional Council of Governments (DRCOG) and administered by the Colorado Department of Transportation (CDOT).

Timeline

As of fall 2019, the project is in the advanced preparation stage, which includes obtaining final property acquisitions and utility relocation activities, expected to continue through March 2020. We anticipate the project will be advertised for construction bid in spring 2020. Construction is estimated to begin in summer 2020 and last for about 18 months, concluding in early 2022. 

Feedback has been received through the public process and will be incorporated into the project design, where feasible. 

  • Capital Improvements Project Open House, Mar. 6, 2019
    • Review the information presented here pdf
  • Intersection Improvements Open House, Oct. 29, 2018. 
  • University of Colorado Design Review Board, July 12, 2018
    • Review  the information presented here pdf
  • ​Transportation Advisory Board, July 9, 2018 
    • Review  the information presented here pdf
  • ​Center for People with Disabilities, May 21, 2018
    • Review  the information presented here pdf
    • Read a summary of the comments received from CPWD   here pdf
  • ​Community  Cycles Advocacy Committee, May 14, 2018
    • Review  the information presented here pdf
    • Read a summary of the comments received from the Advocacy Committee   here pdf
  • ​National Federation of the Blind, Boulder Chapter, May 12, 2018
    • Review  the information presented here pdf
    • Read a summary of the comments from the National Federation of the Blind, Boulder chapter  here pdf
  • ​BeHeard Boulder, May 3, 2018 to June 1, 2018
    • Review  the information presented here pdf
    • Read a summary of the comments received through BeHeard Boulder   here pdf
  • ​​30th & Colorado Corridors Study Open House, May 3, 2018
    • Review  the information presented at this open house  here pdf
      • Read a summary of the comments received at the September 2017 open house  here pdf
  • ​University of Colorado, Boulder Main and East Campus Outreach, review the information presented at this event  here pdf  
    • Read a summary of the comments received  here pdf
    • Sustainability Summit, CU Boulder, April 25, 2018
    • University of Colorado Engineering Council finals week tabling event, CU Boulder East Campus, May 1, 2018
  • ​​30th & Colorado Corridors Study Open House, Feb. 7, 2018
    • Review the information presented at this open house  here pdf
      • Read a summary of the comments received at the September 2017 open house   here pdf
  • 30th & Colorado Corridors Study Open House, Sept. 25, 2017. 
    • Review  the information presented at this open house  here pdf
      • Read a summary of the comments received at the September 2017 open house  here pdf


Contact 

Jenny Godwin, City Transportation Planner, at [email protected] or by calling 303-441-4934.

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