Latest News: September 12, 2018

Current construction work zones map

The map above displays the current and upcoming work areas for the Thornton Substation Project. Click on the map to see a larger version.

Holly Street

Crews are working within Holly Street, between East 112th Avenue and East 120th Avenue, to install the underground transmission line. Working hours are from 7 a.m. to 7 p.m. and lane closures and traffic control will be in place 24 hours a day in the work zones. Current construction work zones within Holly Street include:

  • Holly Street, between East 112th Avenue and East 113th Place: Traffic is reduced to one northbound and one southbound lane with the center lanes of Holly Street closed in the work zone.
  • Holly Street, between East 113th Place and East 117th Avenue: Traffic is reduced to one northbound and one southbound lane with the lanes on the east side of Holly Street closed in the work zone.
  • Holly Street, between East 117th Avenue and East 119th Avenue: Traffic is reduced to one northbound and one southbound lane with the center lanes of Holly Street closed in the work zone.

Starting on September 13, 2018, the construction work zones will include:

  • Holly Street, between East 113th Place and East 117th Avenue: Traffic is reduced to one northbound and one southbound lane with the lanes on the east side of Holly Street closed in the work zone.
  • East 113th Place, between Holly Street and Jasmine Street: This area will be closed to through traffic for approximately one week. Motorists should use East 117th Avenue and East 119th Avenue to access the neighborhood. Sidewalk restrictions may occur during this work, and we encourage pedestrians to follow all posted detour signs.

In the coming weeks, traffic restrictions may be place in East 117th Avenue, east of Holly Street.

East 119th Avenue

East 119th Avenue, between Holly Street and East 119th Place, has reopened to through traffic. As substation construction continues, there may be temporary lane or road closures as equipment enters and exits the substation site.

East 112th Avenue

East 112th Avenue, between Holly Street and Riverdale Road, has reopened to through traffic. As transition structure construction continues, there may be temporary lane or road closures as equipment enters and exits the site.

We thank the community for your continued patience during the construction of the project. Public safety is at the foundation of all we do. It's our mission to ensure your family, neighbors, and every one of our employees stay safe each day. Xcel Energy is committed to continuing to maintain safe construction work zones and appropriate motorist and pedestrian detours. Please use caution when walking or driving near construction zones.

Please be mindful of current construction conditions and traffic control measures, as they are likely to change based upon construction progress. Please help us maintain a safe community environment by participating in safe practices near our construction work zones:

  • When feasible, take alternate routes to bypass the construction work zones.
  • Slow down near construction work zones and follow the posted speed limit.
  • Be aware of the location of crews and equipment.
  • Eliminate distractions such as cell phones.
  • Expect delays to navigate through the work zone.
  • Follow all posted signs and directions from construction or traffic control personnel.
  • Be aware of the location of traffic cones, barrels and barriers that define travel lanes and identify the construction work zones.
  • Be mindful that construction work zones change frequently.

This webpage will be updated as additional information regarding construction activities is available.

If you have any questions or concerns about our construction, please email us at info@xcelenergythorntonsubstation.com or call our project hotline at 844-551-6281. To receive email updates, subscribe to the Thornton Substation email list.

Please note that construction schedules are subject to change.

Project Schedule

Please note that the project schedule is subject to change.

  • Fourth Quarter 2017: Installation of security fencing and demolition of existing structures at the substation site
  • Second Quarter 2018: Grading activities to begin
  • Second Quarter through Third Quarter 2018: Wall and foundation construction
  • Second Quarter through Fourth Quarter 2018: Underground transmission line construction
  • Fourth Quarter 2018 through First Quarter 2019: Underground transmission line cable installation
  • Fourth Quarter 2018 through Third Quarter 2019: Substation electrical equipment installation and testing
  • Mid-2019: Substation construction complete and in-service
  • Third Quarter through Fourth Quarter 2019: Installation of landscaping