To alleviate the bottleneck of transloading freight from standard gauge cars to narrow gauge at Mound House, the northern 140 miles of the railroad to Mina, Nevada was converted to standard-gauge in 1905. The Southern Pacific formed a new subsidiary, the Nevada & California Railway on April 7, 1905 to build a standard gauge connection from Hazen on the Fallon Branch, to Churchill, where it joined the original C&C mainline. The C&C itself was then merged into the N&C.
Not to be confused with an earlier Nevada & California Railroad that later became the Nevada - California - Oregon Railway.
Standard gauging of Tonopah Railroad completed August 14, 1905. Tonopah and Goldfield Railroads merge into the Tonopah & Goldfield Railroad on November 1, 1905.
When the new Hazen cutoff was completed, the old C&C line from Churchill to Mound House was converted to standard gauge. A new alignment was built that bypassed the town of Hawthorne, establishing the new station of Thorne several miles to the north. The shop facilities of the C&C at Hawthorne were closed, and new facilities were built closer to Tonopah Junction.
The Company's original plan was to construct the facilities in Sodaville, but the property owners, seizing upon the Tonopah Boom, desired too much for the land. Instead the SP established a new station at Mina, 10 miles north of Sodaville. Mina was named for Ferminia Sarras, a famed prospector and large landowner known regionally as the 'Copper Queen'. Mina became the new division point on the railroad. Shops for narrow and standard-gauge locomotives were established, along with a large interchange yard, stock yard, ice house, freight and passenger depots and a sprawling company town to house the employees who worked there.
In 1909 a boom in output from the Lucky Boy mine to the south of Hawthorne brought interest in re-establishing the railroad to Hawthorne. Though the Southern Pacific drew up a new alignment to connect Thorne with Hawthorne, nothing came of the project.
The railroad was 1912 and merged into the Southern Pacific Railroad and was known as the Nevada & California Branch. It became part of the Salt Lake Division.