Hoisington modernized and grew steadily over the following decades. The city's first power plant opened in 1903, and a city water system was completed in 1904. The railroad, known by that point as the Missouri Pacific, continued to play a central role in the city's development, employing 1,600 local men by 1911. Hoisington became a major freight and passenger operating division, complete with a roundhouse and shops. Electric street lights were installed in 1915, and the first streets were paved in 1917. The discovery of natural gas in the area in 1929, followed by the discovery of oil in the area in the 1930s, diversified and further stimulated the local economy.