After the discovery of vast amounts of galena ore here by Eli Carpenter and Jack Seaton in 1891, prospectors flocked from around North America to stake their claims. Sandon was incorporated as a city on January 1, 1898^[1] and for a few years had more than 5000 residents, brothels and a booming economy.^[2] Two different railways raced to reach the town first; the Kaslo & Slocan Railway, connecting Sandon with nearby Kaslo, on Kootenay Lake, and the Nakusp & Slocan Railway-Canadian Pacific, from New Denver and Nakusp. Significant acts of sabotage were committed upon both railroads. Well into the 1900s, the hills around Sandon were actively mined by mines such as the Silversmith, the Slocan Star and The Payne.

Source:  https://en.wikipedia.org/wiki/Sandon,_British_Columbia

References:

• From Boom to Bust in 20 Years: Sandon’s History as an Incorporated City, Social History subsection, Sandon Museum website, The city was disincorporated in 1920.
• Mackie, John (4 April 2008). “Population: 6. Number of trolley buses: 8”. The Vancouver Sun. Retrieved 19 November 2010.