sentences:  The city is located in both Benton and Washington counties along Interstate 49/US Highway 62/US Highway 71 (I-49/US 62/US 71).This is the only fully controlled access route through the area, which replaced the winding US 71 (now US 71B) in the 1990s.An interstate connection with Fort Smith to the south and Kansas City, Missouri to the north has greatly helped to grow Springdale.