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Transmission projects

We are committed to providing safe, reliable electric service to all of our customers. To ensure the grid remains reliable 24 hours a day, 365 days a year, we make strategic infrastructure investments. We plan years in advance to make sure you have the energy you need, when you need it. As such, we have a variety of projects planned or underway to install the equipment necessary to transmit electricity to your home or your business.

Colorado Electric

No later than April 30 of each year, each electric utility shall file with the Colorado Public Utilities Commission (the “Commission”) its proposed new construction or extension of transmission facilities for the next three calendar years, commencing with the year following the filing. The purpose of this filing is to advise the Commission of planned transmission system development and inform their decision as to whether those projects require a Certificate of Public Convenience and Necessity (“CPCN”) or are considered in the ordinary course of business. This report covers 2021 and the three-year planning period 2022 through 2024.

For more information regarding the details of the projects please view the 2021 Rule 3206 Report: Proceeding No. 21M-0005E.

View the report

Projects placed into service

These projects have been completed and placed into service. Therefore, these will be removed from future Rule 3206 filings.

Projects with updated scope or status, filed pursuant to Rule 3206(d)(I)(G)

These projects have had a change in the project scope or status since the previous Rule 3206 filing.



South Dakota

  • No projects at this time.



  • No projects at this time.


Transmission line siting process

Starting a new transmission line project is a process we take seriously. We look at a number of things when siting a line, like cost, land use, number of and proximity to residences, environmental sensitivities, and cultural or historical areas. We typically use a five step process for siting our transmission projects.