The Powerhouse building: a 1907 industrial landmark
The Powerhouse building was constructed in 1907 to supply electricity to the surrounding northwest Arizona mining region — particularly the gold mining operations at Oatman, Goldroad, and the smaller camps strung along the Black Mountains. At the time of construction it was one of the largest and most modern industrial structures in the Arizona Territory (Arizona did not become a state until 1912), and the building's substantial brick masonry and steel-truss roof system reflected the engineering ambition of the era's power-generation industry.
The plant operated as an active power generation facility into the mid-20th century before being decommissioned as larger regional power systems took over and the surrounding mining operations declined. The building sat largely vacant from the 1950s through the 1980s, deteriorating slowly while serving occasional secondary uses. By the 1990s the structure was considered endangered and various community-led preservation efforts began documenting its condition and exploring restoration options.
The current restoration was completed in the early 2000s as part of a broader downtown Kingman revitalization initiative. The City of Kingman acquired the building, secured funding from state and federal historic preservation grants, and converted the interior into a multi-use cultural facility while preserving the original industrial character — exposed brick walls, original timber framing where it survived, and reinterpreted industrial details throughout the exhibit spaces. The Arizona Route 66 Museum opened inside the restored Powerhouse in 2001 and has continued to expand and refine its exhibits across the subsequent decades.