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About Park Hill Detention

Park Hill Detention 


This new stormwater management system will reduce flooding in the Park Hill area by installing new stormwater pipes along 39th Avenue from Dahlia Street to Grape Street, and near Dahlia Street and Smith Road. The project will also construct a detention area in the northeast corner of Park Hill Golf Course to more effectively hold and slow stormwater that flows through the area. 


Construction crews are working near Dahlia Street at Smith Road and 39th Avenue, working their way east along 39th Avenue to Grape Street. Initial work involves the removal of asphalt and relocating several existing underground utility pipes.


map of project work area 

Project Status

Construction began in November 2018 and is planned for completion in June 2020. 


Notice of Water Service Interruption, Thursday, December 5

As part of the Park Hill Detention project, it is necessary to temporarily shut down water service on Thursday, December 5, to relocate a waterline. Water service will be interrupted for some properties along E. 39th Avenue and Elm Street between 38th and 39th Avenue. The shutdown is scheduled to occur between the hours of 8 a.m. to 2 p.m. and is dependent on weather. SEMA is coordinating with Denver Water to minimize the service interruption.

Construction Updates 

Street Impact Update — As of December 2019


  • 39th Avenue from Eudora to Elm – through end of December
  • Dahlia Street just south of Smith Road – through early 2020
  • Dahlia Street just north of Smith Road – through early 2020


  • 39th Avenue from Elm to Forest Street reduced to one eastbound lane through end of November
  • Periodic lane closures on Smith Road near the northeast corner of the Park Hill Golf Course for truck haul operations are guided by flaggers


  • 39th Avenue at Grape – early December
  • 39th Avenue from Dahlia to Elm – mid-December


  • 39th Avenue at Forest Street – early December
  • 39th Avenue from Forest to Grape – reduced to one eastbound lane, mid-December
  • 39th Avenue & Grape intersection – early 2020

ROAD WORK: Speed reductions on Smith Road near Dahlia Street for work on the center median; travel lanes will be maintained in both directions


map of closures in Park Hill project area 

Access to businesses and properties will be maintained during construction.


Construction on the Park Hill Detention project continues to progress as scheduled. As of mid-March, the project is 10% complete. Milestones reached include:

  • Boring underneath the train tracks and roadway at Smith Road.
  • Tree and landscape removal at the stormwater detention area.
  • Start of excavation of the stormwater detention area.

Coming in April, crews will be relocating water, storm and sanitary pipes and installing new storm water pipes along 39th Avenue from Dahlia to Elm Street. 

Permanent Detention area location 

  • Installation of construction fencing
  • Removal of landscaping and soil
  • Increased construction traffic
  • Installation of an outlet structure
  • Planting of native grasses

Construction will continue through the end of summer 2019, but is dependent on weather conditions and other factors affecting construction.

Construction Work Hours

Normal working hours along 39th Avenue between Dahlia and Holly Street will be Monday–Friday from 7 a.m. to 9 p.m. and Saturday–Sunday from 8 a.m. to 5 p.m.

Work hours on the stormwater detention area at the Park Hill golf course are limited to Monday–Saturday from 8 a.m. to 5 p.m. 

General Traffic Impacts: The project will require occasional road and intersection closures in and around the work area. Starting in early December, expect heavy equipment use resulting in vibrations and noise at these locations.


Open House – April 23, 2019

Open House — December 11, 2018

Check back for information on meetings in 2019.

Project Contacts

If you have questions about the project, would like to receive updates, or would like to be notified of upcoming closures, please contact the Public Information Team. We will respond within 24 business hours.

The Project Team will be contacting affected businesses in advance of construction activities.

Project Hotline: 720-990-6400


Sign up to receive traffic impact updates by text: Send “ParkHill” to 313131