Avery Substation Project

Avery Substation Project

Project Updates

Project Update

The Avery Substation was energized June 22, 2022, and is now providing power to the towns of Windsor, Timnath, Severance and surrounding communities. Landscaping will be installed along CR 76 this fall.

It was our pleasure to work in your community. We thank you for your patience and cooperation during construction. If you have questions or comments about the project, please call us at 1-800-895-4999.

Project Overview

Avery Substation and the connected 1.3 miles of new transmission line add capacity to deliver reliable, safe electric power to a fast-growing area of northern Colorado. Proactive planning for current and future growth helps reduce the risk of electric outages and improves grid reliability while meeting needs for years to come. View benefits (PDF)

The Avery Substation Project includes several components:

  • A new electric distribution substation located in Windsor
  • 1.3 miles of overhead double-circuit 230-kilovolt (kV) electric transmission line
  • Interconnecting with the existing Platte River Power Authority Timberline-Ault 230-kV transmission line to provide Avery Substation with the electrical supply needed to power distribution feeders serving surrounding communities.
  • New distribution lines and upgrades to existing distribution lines near Windsor, Severance and Timnath.

We started working with the community on this project in 2012. Over 1,700 landowners and stakeholders were invited to attend a public open house on July 9, 2019. Attendees were asked for feedback on two potential substation sites and the transmission line extension in Windsor, both on property owned by the City of Thornton. We then identified the West Site (PDF), located northeast of Weld County Road 76 and Latham Parkway in Windsor, as the proposed project location because it offered a wide range of benefits and was the preferred site based on public feedback.

The Town of Windsor approved the Conditional Use Grant permit application for the West Site in November 2019. Additional details about the Town of Windsor Planning Commission and Town Board approvals can be found on the Town of Windsor website (external link).

Site Information


The substation is located more than 1,500 feet away from adjacent subdivisions to reduce the visual scale of the facility.

Wetlands and wildlife

The substation maximizes distance from wetlands near Lee Lake and near Weld County Road 76 that may support wildlife.


The substation uses existing vegetation, topography, and distance to reduce the visual impact of the facility and will also incorporate additional landscape screening in the site design.

View simulations

Transmission line

The substation includes a straighter path for the transmission line and minimizes the number of large support structures, while increasing the distance of the transmission line from the majority of viewers.

Community preferred

The substation is consistent with the consensus of those attending and commenting on the project during the July 2019 public open house for the reasons outlined above.