Our history

PSE has a rich history of energy leadership, ground-breaking innovation and dedicated service to our customers and local communities.
Here’s an at-a-glance timeline, with notable energy milestones.

  • Gas lamp photo
    1873 New Year's Eve

    Seattle Gas Light Company, the earliest PSE predecessor established this same year, introduces the Washington Territory to manufactured gas lighting.

  • light bulb icon
    1879

    Thomas Edison invents the first long-lasting incandescent light bulb.

  • solar icon
    1883

    1883 Thomas Edison invents the first long-lasting incandescent light bulb. The first genuine solar cell is built.

  • electric icon
    1884

    The electric alternator is invented, an electric generator producing alternating current (AC) better for sending electricity over long distances.

  • Historical central power plant
    1886

    Thanks to Seattle Electric Light Company, a PSE predecessor, the Puget Sound region receives electric service from a central power plant.

  •  First large hydroelectric plant at Snoqualmie Falls
    1898

    PSE predecessor Puget Sound Power and Light builds the region's first large hydroelectric plant at Snoqualmie Falls.

  • Columbia River's first massive hydropower plant, the Rock Island Dam
    1932

    PSE predecessors build the Columbia River's first massive hydropower plant, the Rock Island Dam, now owned and operated by Chelan County Public Utility District.

  • Historical photo of Hollywood film
    Mid 1930s

    PSE predecessor Puget Sound Power and Light goes to Hollywood, filming energy's role in society in "Looking Forward" — a quaint and pure public relations effort of the day.

  • hydroelectric icon
    1937

    The Bonneville Dam begins delivering electric power from the Columbia River.

  • Natural Gas picture
    1956

    The Puget Sound region receives its first natural gas service from the Washington Natural Gas Company, a PSE predecessor.

  • solar icon
    1994

    The first solar dish generator is tied to a utility grid.

  • Puget Sound Power Light logo
    1997

    PSE adopts its name and current structure upon the merger of Puget Sound Power and Light Company and Washington Energy Company.

  • Two wind facilities complete (Wild Horse and Hopkins Ridge)
    2005

    With two wind facilities complete (Wild Horse and Hopkins Ridge), PSE is the single largest producer of renewable energy in the Pacific Northwest.

  • wind turbine icon
    2012

    PSE completes its third and largest wind project, the 343-megawatt Lower Snake River Wind Facility.

  • renewable icon
    2018

    PSE announces its commitment to reducing its carbon footprint by 50 percent by 2040