300MW powering the world’s first steel mill to run almost entirely on solar

One of Colorado’s largest solar projects, Bighorn Solar in the city of Pueblo entered commercial operation in December 2021. Lightsource bp developed, financed, and will continue to own and operate the 300 megawatt utility-scale solar project. Electricity generated from Bighorn Solar is delivered into the grid and purchased by Xcel Energy under a long-term power purchase agreement (PPA) with Lightsource bp. Xcel Energy is a major U.S. regulated electric and natural gas delivery company that serves approximately 3.7 million electricity and 2.1 million natural gas customers across parts of eight Midwestern and Western states.

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    Site selection & preliminary design

  • 4Ti0zG5k-design

    Stakeholder outreach

  • 9tguFMyH-planning

    Permitting & environmental studies

  • RcLrW4w7-discharge

    Land management & biodiversity planning

  • zq4W7u03-construction

    Final engineering, financing & construction

  • Operation

    Operation & maintenance

  • Decommissioning & recycling

Xcel Energy delivers electricity from Bighorn Solar to the EVRAZ North America Rocky Mountain Steel mill in Pueblo, one of the city’s largest employers. With its 20-year, fixed rate PPA structure, Bighorn Solar provides low-cost, stable electricity prices that the steel mill needed to stay in Pueblo and invest in its future there, supporting more than 1,000 jobs in the local community.

Bighorn Solar supports the broader Colorado Energy Plan, which will deliver 55% renewable energy to the grid by 2026 and reduce carbon emissions by 60%, as well as Xcel Energy’s bold vision to deliver 100% carbon-free electricity by 2050.

Xcel Energy and Lightsource bp are incredibly proud of this solar project, and the opportunities it offers the organizations and the local communities.

“If you were wondering what a renewable energy future would look like, this is a great example.”  – Colorado Governor Jared Polis, speaking at the announcement press conference

  • 300MWᴅᴄ
    /240MWᴀᴄ capacity
  • 433,770
    metric tons of CO2 saved per year
  • 92,100
    fuel-burning cars taken off road (equivalent)
  • 300
    local jobs created
  • $22M
    local tax revenue


Find out more about our Responsible Solar approach

Videos of our Bighorn Solar project

Here are some project specific updates:


Bighorn: Where solar meets steel

The EVRAZ Rocky Mountain Steel Mill will become the first steel mill to run almost entirely on solar.


Introducing Bighorn Solar

Flyover footage of our site plans and extra information on the project


Creating & Retaining Jobs in Pueblo, Colorado

Our Bighorn Solar project is revitalizing the economy by creating jobs.


American Clean Power Week

Our Bighorn Solar project was featured during American Clean Power Week, 2021.



We’ve received lots of interest in our Bighorn Solar project, so we’ve put together a list of the most commonly asked questions, and their answers.


Get in touch

If you’d like to find out more about this project, email info@lightsourcebp.com, or fill out the form below. We aim to get back to you within five working days.

In the community

We construct our solar farms with a view to improving soil health, fostering biodiversity, and strengthening local economies. From ecological assessments to community engagement, we do our best to create solar farms that local communities can be proud of.

Learn more about our communities

Take a look at some of our other projects

We work with businesses and communities around the world to create low carbon, solar energy projects that make a difference.

See more of our USA solar projects