1925: the Leo Williams general store
The original building was constructed in 1925 by Leo Williams, a Riverton merchant who recognized that the new federal highway being routed through southeast Kansas — what would shortly be designated US Highway 66 in 1926 — would bring meaningful commercial traffic past the crossroads at Riverton. Williams built a substantial single-story wood-frame general store with a deep front porch, a large interior retail floor, and a small attached residential quarters at the rear of the building. The construction is generally dated to early 1925, making the store a few months older than the official 1926 establishment of Route 66.
The general-store model in 1925 was the standard rural-Kansas commercial format — groceries, basic dry goods, hardware, animal feed, kerosene, and a small selection of household items. Williams's store served the surrounding farming community in addition to whatever passing-through highway traffic the new road brought. By the late 1920s and into the 1930s, the increasing flow of Route 66 traffic — including Dust Bowl migrants heading west, depression-era travelers, and small commercial traffic — had transformed the store's customer mix toward a meaningful share of out-of-state travelers buying gas, sandwiches, and travel supplies.
Williams operated the store for several decades before passing the business through a series of owners across the mid-20th century. The building survived the entire Route 66 commercial heyday of the 1930s through 1960s without significant structural alteration, which is the operational reason the store retains so much of its original character today. Many comparable Route 66 retail buildings were extensively remodeled across the decades; the Riverton store was not.