The briefest history of SLC you'll find:
Construction on the Mormon temple began in 1853, but the capstone of this magnificent structure was not put into place until 1892. The temple was built with granite blocks which, until a branch railroad line was run into Little Cottonwood Canyon, were individually hauled by ox and wagon from the canyon to the building site.
In 1869, the transcontinental railroad was completed by the driving of the Golden Spike at Promontory Summit, some 80 miles northwest of Salt Lake City. Utah was thus connected to the East and West. Many people traveled by rail to see the "City of the Saints." Some stayed to make and to lose their fortunes in mining. From the 1860s to the 1920s hundreds of copper, silver, gold, and lead mines were opened in the nearby canyons, including Bingham Canyon. Gigantic smelters were later built to refine the ore. Some prosperous mine owners constructed large, gracious homes along South Temple, once known as Brigham Street.
The 1890s were a decade of change. The Mormon Church officially ended the practice of polygamy. In 1896, Utah became the 45th state and the third to extend the vote to women. Salt Lake City was its capital. "Great" had been dropped from the name in 1868.
Salt Lake began to assume its present character in the early 1900s. The State Capitol and many other historic buildings were constructed. Electric trolleys, garaged at Trolley Square (now a popular shopping mall), were installed to transport people living in the Avenues, Capitol Hill, Liberty Park, and Sugar House areas to downtown. The trolleys were gradually replaced in the 1930s by buses. The last streetcar line was discontinued in 1941.
Eagle Gate, which had served to mark the entrance to Brigham Young's estate, was reconstructed to allow traffic flow. City parks were built, sewer systems and street lighting were installed, and streets were paved. Between 1900-1930, the city's population nearly tripled.
The Great Depression brought construction to a standstill, but the boom sounded again during World War II. War industries and military installations revitalized the economy. Workers and soldiers spent their money in the city's restaurants, shops, ballrooms, and theaters.