Is U.S. 93 across Hoover Dam on the NN?
(Miscellaneous) U.S. 93 on the Arizona side of the dam is not on the NN. However, in Nevada it is on the NN up to where the Bureau of Reclamation jurisdiction begins. The dam itself is owned by the Bureau of Reclamation which has authority to establish traffic regulations on the highway across the dam and could prohibit commercial motor vehicles from using it if they chose to do so.