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.
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.
Thomas Edison invents the first long-lasting incandescent light bulb.
Charles Fritts builds the first genuine solar cell.
The electric alternator is invented, an electric generator producing alternating current (AC) better for sending electricity over long distances.
Thanks to Seattle Electric Light Company, a PSE predecessor, the Puget Sound region receives electric service from a central power plant.
PSE predecessor Puget Sound Power and Light builds the region's first large hydroelectric plant at Snoqualmie Falls.
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.
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.
The Bonneville Dam begins delivering electric power from the Columbia River.
The Puget Sound region receives its first natural gas service from the Washington Natural Gas Company, a PSE predecessor.
The first solar dish generator is tied to a utility grid.
PSE adopts its name and current structure upon the merger of Puget Sound Power and Light Company and Washington Energy Company.
With two wind facilities complete (Wild Horse and Hopkins Ridge), PSE is the single largest producer of renewable energy in the Pacific Northwest.
PSE completes its third and largest wind project, the 343-megawatt Lower Snake River Wind Facility.
PSE announces its commitment to reducing its carbon footprint by 50 percent by 2040