The Bingham Canyon mines experienced their greatest boom during the first years of the twentieth century, as the district's smaller mines were consolidated under large corporate ownership. The most significant development occurred in 1903, when Daniel C. Jackling organized the Utah Copper Company to begin surface mining at Bingham Canyon. The Utah Copper Company's mine prospered, and this brought a tremendous influx of new residents into the canyon. The town of Bingham Canyon was officially incorporated on February 29, 1904. By the 1920s, the city of Bingham Canyon was at its peak, with perhaps 15,000 inhabitants. Urban development spread for some seven miles along the single, narrow road winding up the steep canyon floor.