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The polygonal exhibition hall is the architectural centerpiece of the Iron County Fairgrounds. The two-story central octagonal core with three radiating one-story wings is made of concrete blocks set in red mortar. It is covered with a low-pitched roof with clerestory windows and has jerkinhead roofs on the wings. The main gabled entrance features a porthole window in the gable, recessed brick concentric wall arches over the triple doors, and a tympanum in the lower arch inscribed with the construction date. The Iron County Park Commission and the Iron River School Board selected the site, and the Iron County Board of Commissioners appropriated funds for the exhibition hall's construction. The Iron County Fair was first held in 1899, an outgrowth of the annual exhibitions of the Iron County Agricultural Society, organized to encourage the production of quality crops and livestock as a basis for a stable agricultural economy.