In the 1920s and 1930s, Sillamäe and surrounding countryside saw the rise of the oil shale mining industry in the area. In 1927–1929, a Swedish company Estländska Oljeskifferkonsortiet built an oil shale processing plant and a power station at the location of the Türsamäe manor, on the western side of Sillamäe. This plant reached a total capacity of 500 tonnes per day in the mid-1930s.