Skip navigation

About the 39th Avenue Greenway & Open Channel



The 39th Avenue Greenway and Open Channel will effectively and safely convey floodwater to the outfall at Globeville Landing Park. Outside of storm events the area will remain mostly dry.

This channel is an integral part of Platte to Park Hill: Stormwater Systems. It will be designed using a community-focused approach to provide the following benefits in addition to flood protection:

  • Add 12 acres of new recreational open space in the Cole neighborhood
  • Enhance community connectivity, including a biking/walking trail between Franklin and Steele streets
  • Improve quality of stormwater entering the South Platte River

39th Avenue Greenway Draft Design Concept

SEMA created this flyover video based on the design criteria we developed with the 39th Avenue Greenway design workgroup and the broader community. We hope this conceptual model will get you even more excited about working together to continue refining the greenway.


The Request For Proposals (RFP) includes guidelines that will drive the design of the greenway and multi-use trail based on input received from the public and representatives of the Cole and Clayton neighborhoods. Residents, including local property owners, participated in a nine-month, collaborative process to develop and inform the design guidelines included in the RFP.

Rendering of potential greenway map and amenities

Rendering of greenway and open channel — click to enlarge (PDF - 30MB)

This timeline is tentative and subject to change at any time pending Council action.

39th Avenue Greenway and Open Channel Tentative Timeline

The city will select the design-build contractor in the Fall of 2017, with construction expected to begin in late 2017. The Greenway will be operational in late 2019.

The design of the preferred project footprint will continue to progress through the end of the year and into 2017. We have identified properties that – depending on the ultimate design of the project – may require a temporary or permanent easement to access and utilize part of a property during construction and/or for maintenance after construction; or the purchase of some or all of a property.

We are currently seeking approval to initiate our land acquisition authority process.  This process is called a Land Acquisition Ordinance (“LAO”).  If approved by City Council, the LAO allows us to initiate conversations with owners of properties that may require an easement or need to be purchased. If your property is identified in the LAO, you will be notified in writing with a Notice of Intent which will outline additional processes to facilitate the acquisition process.  

Open drainage systems in the form of greenways and open channels naturally clean stormwater as it flows. Green infrastructure like the 39th Avenue greenway offers opportunities to:

  • Better control stormwater and improve public safety
  • Improve water quality
  • Increase plant diversity
  • Improve natural ecosystems
  • Create 12 acres of new recreational open space, including a bike/pedestrian trail and other community amenities

The planting and vegetation surrounding the open channel will provide natural filtration to improve water quality. Additionally, open channels help remove water borne contaminants by exposing them to sunlight and are generally safer than large underground pipes as they slow and control stormwater across wider channels and gentler banks.

green vegetation along Weir Gulch banks

Vegetation at Weir Gulch provides water filtration benefits

park features with green open space

Recreational and green space come together at Greenway Park

As part of a community-focused and benefits-driven process, the City is currently working with local residents to identify design guidelines for the greenway.

Project Status

Design guidelines for the greenway were finalized in early 2017. A final design-build team was announced in Fall 2017. Construction began in Summer 2018. The Greenway will be completed in Fall of 2020.