In 1904 Frank “Shorty” Harris and Ed Cross found green-colored, high grade gold ore, setting off a gold rush that created the Bullfrog District. Its premier community was Rhyolite, which was platted in 1905 and quickly grew into the largest city in southern Nevada. Eventually served by three water systems and three railroads—the Tonopah and Tidewater, the Bullfrog Goldfield, and the Las Vegas & Tonopah, whose 1908 depot still stands—Rhyolite boomed. By 1907 it claimed a population of 6,000. After the economic collapse of 1907 and the closure of Charles Schwab's Montgomery Shoshone Mine in 1910, the town died. By 1920 only 14 residents remained. During its heyday, the lack of local timber supplies led to concrete and adobe being used for most buildings, though three buildings were built from empty bottles, with one still standing today. The town's growth was fast, and its demise nearly as fast, and it stands as a testament to the mining heritage of southern Nevada.