US 80 then continued onto the south frontage road from Piedra through Theba and Smurr before finally reaching Gila Bend, becoming Pima Street. Today Pima Street acts as both I-8 Business and SR 85. The intersection of Martin Avenue and Pima Street served as the northern terminus of SR 85, which itself has since replaced US 80 to Phoenix. Gila Bend is home to the iconic 1961 vintage Space Age Lodge, a motel with an outer space theme sporting a fake alien spaceship on its roof. The oldest remaining building in Gila Bend, the former Stout Hotel, is also located on former US 80 in town. US 80 turned north towards Phoenix, leaving Pima Street at Old Highway 80. The rest of the I-8 Business loop east of this point was formerly SR 84 to Casa Grande. The old highway parallels the Gila Bend Canal through Cotton Center and crossed over an old concrete bridge (now destroyed with only one span left standing) then curved northwest, arriving at the eastern bank of the Gila River near the ruins of the Gillespie Dam.