Needed to supply power and steam to the Fred Harvey and Santa Fe Railway facilities on the South Rim and steam to heat railroad cars in the rail yards, the building is constructed of reinforced concrete and steel. Combining a straightforward industrial function with qualities of a Swiss Chalet, overscaling of windows, balcony, eaves, and exterior masonry, makes the buildings appear considerably smaller than it actually is. In contrast, the interior is basically industrial with concrete floors and walls, and steel framing. The two original Fairbanks-Morse diesel generators are still in place, along with an overhead crane for maintenance. The Power House operations were shut down in 1956.³⁵