A short line with a short life, the 40-mile-long Wyoming North and South Railroad began quietly during the oil-boom years of the 1920s. It helped the Salt Creek area thrive for a time, but unsound construction, better roads for cars and trucks, bad weather and the Great Depression sealed its demise.
In August 1922, five U.S. Marines “invaded” the U.S. Naval Petroleum Reserve at Teapot Dome in central Wyoming to evict oil drillers the government had determined were there illegally. Bribery connected with acquiring those drilling rights eventually led to the Teapot Dome scandal—one of the worst in U.S. politics.
Oil refining in Wyoming began in 1895. By the 1920s the state boasted 16 refineries, with Standard Oil’s plant at Casper by far the largest. Production tracked oil booms and busts throughout the 20th century, culminating in the 1991 shutdown of Casper’s Amoco (formerly Standard) Refinery. Six refineries remain in production today.