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27th Street Storm System

The 27th Street Storm Drain is one of several large diameter storm drain projects that the City and County of Denver has identified to improve public safety by relieving drainage and flooding issues in the Curtis Park and Five Points neighborhoods. The 27th Street Storm Drain project includes approximately 5,900 linear feet of large storm pipe ranging in size from 78 inches to 96 inches in diameter.

Stormwater runoff in this rapidly developing area currently drains to the South Platte River at the over-utilized 36th Street Outfall, which can lead to flooding during storms. The new storm drain will be located in 27th Street between Blake Street and Welton Street, and in Washington Street between 27th Street and 20th Avenue. 

In addition to providing flood relief in the immediate area, the new, enlarged 27th Street stormwater system will work in concert with stormwater systems along 33rd and 36th Streets to provide greater flood protection to the larger area.

When complete, the new storm drain system will connect to an existing 108-inch storm drain at the Coors Field Parking Garage at Blake Street, part of the 29th Street Outfall, balancing water flow between multiple systems and resulting in less flooding and ponded water along the 27th Street and Washington Street corridors. 


  • Underground stormwater facilities including a water quality trash vault at Walnut Street to remove large pieces of trash before stormwater continues to the South Platte River
  • New and upgraded storm inlets to allow larger volumes of stormwater to enter the storm drainage system faster and more efficiently
  • New curb ramps in 27th and Washington Streets to comply with current ADA requirements 
  • Reconstruction and repaving of 27th and Washington Streets with improved street drainage
Project Status: Construction Beginning

Construction on Phase 1 began in October 2018 and is expected to be complete in March 2019.

Council District: 9

Neighborhoods: Curtis Park, Five Points
RiNO Business Improvement District


Construction Update: 12/5/18

Work is going well on 27th Street, as tunneling and manhole work continues. The installation of the 96" stormwater pipe — from Walnut to Blake — begins this week. This work will change the traffic configuration in this area. Please note that 27th Street will be closed at Walnut, however, 27th will now open part-way to local traffic at Blake. See the map for details.
Check out the $5 parking in the public parking garage to the west of 27th and Blake Street. The temporary entrance to the garage—at Blake and 26th Street—is clearly marked. Please remember that in addition to construction being hard on local residents, construction is also hard on local businesses. During this holiday time, consider dining out and shopping at the businesses in RiNO. 
We hope to see you at our Construction Coffee next week, on Tuesday, December 11th. We will be at The Denver Central Market (2669 Larimer) from 10:30 to 11:30. Come get answers to any questions you may have. We are usually right inside the front door, to the left. Just look for the bright yellow and orange construction gear. 

traffic impact map 



  • 2005: Identified in Storm Drainage Master Plan
  • 2015: Preliminary Design
  • 2017/18: Final Design
  • 2018/19: Construction, Phase 1

Due to high traffic volume and below-ground utility density, stormwater pipe installation will take place by tunneling beneath Blake Street. The work between the Coors Field parking lot and Walnut Street cannot begin until the Colorado Rockies 2018 season has ended and must be completed by the Saint Patrick’s Day Parade in March 2019.

Beginning at the 27th and Blake Street intersection and heading southeast, 27th Street will be closed to through traffic in sections, with no more than one block and one intersection closed at one time. Local access will be maintained. Businesses and residences may have temporary water and sewer disruptions for 6 to 8 hours.

This will be an active construction site with open excavations and equipment in the neighborhood. Caution should be exercised near all construction operations.

The 27th Street Storm Drain project was first identified in the 2005 Stormwater Master Plan. This project is a high priority focus stormwater basin and was included in the 2016-2021 Six-Year Capital Improvement program. The project will be designed and built in stages based upon funding availability. 

Meeting Materials

July 2018: Presentation (PDF)

May 2018: Presentation (PDF)

Tunneling Locations

tunneling locations on 27th Street at Blake Street

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Email us directly at with any questions or concerns.

Call the project hotline at (812) 567-2131 for weekly updates, and to leave a message with questions or concerns.



Hotline: 303-834-3588

City and County of Denver

George Murphy, Project Manager
Denver Public Works
303-446-3619 |

Kelly Crum, Senior Engineer
Denver Public Works
303 446 3668 |


Jaime Diaz, Project Superintendent
Iron Woman Construction
303-887-3621 |

Design Engineer

Merrick and Company
Brian Poling
720-363-5462 |