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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

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: 12/12/18

Tunneling continues to go well, and the 96” inch sanitary sewer pipe is going in quickly between Blake and Walnut. The traffic shift on Blake at 27th will be cleared this week, and Blake will return to normal for a while. That will open up a few parking spots along Blake near 27th.

Upcoming: We are planning for the full closure of the Walnut / 27th intersection starting sometime during the week of January 7th. This date is an estimation, but we wanted to give everyone a heads up that it is upcoming. Detours will be clearly marked, and Walnut — for one block in each direction of 27th — will temporarily go to two-way traffic to grant easy access to those affected in that area. See map for details.

Noise: There is a lot of work going on and we understand there is noise as a result. The work being performed between 7am to 9pm is permitted within the noise ordinance of the City and County of Denver. Any noise outside of the standard working hours will only be due to emergency work, or based around impacts to local businesses. We apologize for the inconvenience and we appreciate your patience as we work as quickly as we can—at an accelerated rate—to keep the project moving as fast as possible.

RiNo Art District Passports: Starting December 12th, the RiNo Art District is hosting its 27th Street Passport Program! Support our local businesses affected by the 27th Street Storm Drain Project by visiting their locations. Download the passport or stop by area businesses to pick one up. A completed passport will enter you for a chance to win one of many wonderful prizes! Promotion goes live December 12th, 2018 and will run through 2018. Thank you to the RiNO Art District for their organizing efforts on this project, and to Denver’s Office of Economic Development for their funding support. Get your passport at:

Parking Garage: Remember the $5 parking in the public parking garage to the west of 27th and Blake Street. It’s a great place to park and then be able to spend lots of time at the businesses in the area. The temporary entrance to the garage — at Blake and 26th Street — is clearly marked.

Construction Coffee: Due to the holidays, our next construction coffee will be held on Tuesday, January 8th. We always meet at The Denver Central Market (2669 Larimer) from 10:30 - 11:30. Come get answers to any questions you may have. We are hard to miss in our construction gear, usually right inside the front door, to the left.


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



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 |