| 1978 | • The first concentrate was produced. |  |
• The initial sequence of operation of the Mineral processing plant having an annual capacity of 4 million tons of ore was commissioned. |
| 1980 | • The second operational commissioning of the Mineral processing plant with the development of its annual ore processing capacity up to 8 million tons. |
| 1981 | • Launched the fourth sequence of operations of the Mineral processing plant with the development of its annual ore processing capacity up to 16 million tons. |
| 1989 | • Launched the fifth sequence of operations of the Mineral processing plant with the development of its annual ore processing capacity up to 20 million tons. The overall production reached 1 million tons of copper in concentrate |  |
| 1994 | • Sh. Otgonbileg was appointed as the Director-General by the 22nd Board Session of EMC /Erdenet Mining Corporation/ for the third time. |
• Approved the Strategic Development Concept for 1994-2004 of EMC. |
• The Explosive Plant of EMC was commissioned into operation and suspended the foreign import of high cost explosives. |
| 1995 | • Upgraded the technical advancement completely to the flotation equipments of the Mineral processing plant. |  |
| • Started the utilization of drilling machines ÑÁØ-250ÌÍÀ at the site of Open Pit. |
| 1996 | • In connection with the Strategic Development Concept for 1994-2004, the resolution No. 05 by the Government of Mongolia was passed to carry out a complete technical modernizations over the EMC. |
• BELAZ Dumptrucks with load capacity of 40 tons were halted due to the use of Caterpillar dump trucks with load of 136 tons by America and BELAZ-7512 dump trucks with load of 120 tons by Belarus for transportations respectively. |
• EMC had been supplied its power consumption by Russia directly. |  |
| 1997 | • Upgraded Excavators ÝÊÃ-10 was launched to the transportation at Open Pit mine. |
• EMC produced overall 2 million of copper in concentrate. |
| 1998 | • D. Dorligjav was appointed as the Director-General of EMC by the 27th Board Session of EMC. |
| 2000 | • The second step decision was passed by the 31st Board Session of EMC to privatized the currently owned apartments by the employees in spite of their years-of-service. |
• The decision to privatize the currently owned apartments passed by the 29th Board Session of EMC to those employees whose years-of-service were above 15 years for the first time. |  |
• Kh. Narankhuu was appointed as the director-general of EMC by the 30th Board Session of EMC. |
• Rougher concentrate section was launched into operations and the annual capacity to process ore had reached 24 million tons. |
| 2001 | • Thanks to a complete technical modernization of coupled section I, the ore processing capacity of the same section reached up to 10 million tons. |
| 2002 | • Launched the BELAZ-75145 heavy Dumptrucks, capacity load of 130 thousand tons, for transportations at Vehicle Transport Unit |
| 2005 | • Kh. Narankhuu was appointed as the Director-General of EMC by the 34th Board Session for the second time. |  |
• Launched the “LIEBHERR” excavators, with a bucket volume capacity of 18 m3, for transportations at Open Pit mine. |
• EMC produced 3 million tons of copper in concentrate since its commencement of operation. |
| 2006 | • Thanks to a complete capacity achievements of the 5th sequence of operations of Mineral processing plant, the designed capacity had been increased by 50 percent, allows to process 6 million tons of ore annually. |