U.S. Route 93 in Nevada portion of abandoned railroad right-of-way. A shopping center now sits where the original truck bypass alignment once ran. US 93 was realigned again on October 19, 2010, when the Mike O'Callaghan – Pat Tillman Memorial Bridge over the Black Canyon of the Colorado River opened to vehicular traffic. With that, the highway no longer passes over Hoover Dam, and the state-maintained portion of the replaced route was renamed as Hoover Dam Access Road (SR 172). In 2011, US 93 from Buchanan Boulevard to the Nevada terminus of the Hoover Dam Bypass was expanded to four through lanes with dedicated turn
Indigenous peoples of the North American Southwest the border of Texas and Mexico. Several Spanish explorers described this culture which was related to or derivative from the Jornada Mogollon. Between 700 and 1550 CE, the Patayan culture inhabited parts of modern-day Arizona, California and Baja California, including areas near the Colorado River Valley, nearby uplands, and north to the vicinity of the Grand Canyon. The Fremont culture inhabited sites in what is now Utah and parts of Nevada, Idaho and Colorado from 700 to 1300 CE. Archaeologists use cultural labels such as Mogollon, Ancestral Pueblo peoples, Patayan, or Hohokam to denote cultural traditions within the prehistoric American