Duane's take
Here's how the official marker tells it, and I'll do my best to do it justice. Before 1923, if you wanted the lights on in Granbury, you were at the mercy of privately owned companies. They held the power; literally.
But somewhere along the way, the people of Granbury decided they'd had just about enough of that arrangement. So they voted. Voted to build it themselves, to own it themselves: their own power plant, their own electricity.
Now that's the kind of civic stubbornness that built Texas. The city purchased the Granbury water, ice, light and power company, and then they went and built this very structure to house the new plant. The Municipal Engineering Company put it up; an industrial building, solid and purposeful, the kind of thing meant to last.
And last it did. Inside those walls, diesel engines hummed and churned, generating electricity for the people of Granbury year after year after year. The plant ran all the way until 1954 before it finally went quiet.
But here's the thing: those diesel engines, all that machinery (it's still in there). Still sitting right where it was. The building never let go of its history.
So next time you flip a light switch without a second thought, maybe spare one for the folks in Granbury who once stood up and said, we'll do it ourselves.
What the marker says
Before 1923, privately owned light companies supplied electricity to the citizens of Granbury. In that year, the residents voted to build and own their own power plant. The city purchased the Granbury water, ice, light and power company and built this structure to house the new plant. Constructed by the municipal engineering company, the industrial building still houses the diesel engines and other machinery that generated electricity until the plant closed in 1954.