Interstate 10 in Arizona 2013. The remainder of the old US 80 section was rebuilt to interstate standards, with completion in 2014. East of Tucson, I‑10 parallels and in some cases overlies old US 80 to Benson, and was originally co-signed as US 80 and SR 86. The section of I-10 from Valencia Road to Rita Road was the first construction project in the state of Arizona funded by the Federal Aid Highway Act of 1956. Construction began in 1957 and was completed in 1960. From Benson, the Interstate follows the Southern Pacific mainline east through Willcox and Bowie to New Mexico, rather than
Buckskin Mountains (Arizona) Park is located here. 7. The Bill Williams River downstream from Alamo Lake State Park is the northern border of the three ranges, as well as the de facto border of fold-and-thrust-belt. The river is also a dividing line between the Mojave Desert north and northwest, and the Sonoran Desert, south and southeast; in California, the Colorado Desert subsection of the Sonoran Desert lies southwest. Buckskin Mountains (Arizona) The Buckskin Mountains, of Arizona, are a mountain range in west-central Arizona, USA. The range lies just east of the north-south Colorado River, and borders south of the east-west, west-flowing Bill Williams