[4] Enefit Kaevandused were established in June 1945 as Eesti Põlevkivi, also known by its name in Russian Estonslanets.

[7] After construction of large oil shale-fired power stations in Narva, demand for oil shale increased and consequently Eesti Põlevkivi opened the underground mines Viru (1965) and Estonia (1972) along with the open-pit mines Sirgala (1963), Narva (1970) and Oktoobri (1974; later named Aidu).

The largest underground fire in Estonia, it continued for 81 days and caused serious pollution of ground and surface waters.

[10] In 1998, Eesti Põlevkivi and Dynamit Nobel opened an explosives manufacturing plant in Estonia.

[11] After Dynamit Nobel sold its explosives business to Orica, the later became the main shareholder in the plant.

[13][14] In 1999, Government of Estonia handed 51% of the shares of Eesti Põlevkivi to Narva Elektrijaamad.