In 1964 Kenneth R. Dahle bought land next to the new interstate exit in Milford. Even at that time, he said later, he envisioned building a giant covered wagon next to the freeway. He finally began work on the wagon in the spring of 1976, and two years later it was complete.
The gas station wagon measured 50 feet long and 50 feet high, with its "canopy" made of white roofing shingles over seven laminated wooden arches. Four 24-foot-tall wheels, each assembled from what Dahle claimed were 1,000 pieces of wood, were bolted to the four corners of the building. Dahle hoped to build a giant pair of oxen and never got around to it, but he did later add a cowboy Muffler Man.