In November of 2009, Union Pacific instituted a major change to operations in the Sierra Nevada Mountains. Numerous tunnels along the Donner Pass Route were retrofitted in order to fit double stac... (more)

PG&E's Hydroelectric infrastructure often dominates the scenery of the Feather River Canyon. Producing some of the cleanest energy in the country, PG&E's dams, powerhouses, tunnels and conduits ca... (more)