Mcewen Inc. · NYSE:MUX

Mcewen — McEwen Mining — Corporate Update (September 2012)

9 slides from Mcewen's corporate update, Sep 28, 2012

1. Slide 1: El Gallo Complex Final Photo Update

   MUX McEWEN MINING Proud Member Congratulations Team on the First Gold Pour! El Gallo Complex Final Photo Update September 28, 2012

2. Slide 2: Crushing plant decommissioning and new plant assembly

   2 January 6, 2012 Decommissioning of the previous crushing plant. April 13, 2012 New retaining wall for crushing plant installed. May 11, 2012 New crushing plant assembly. August 17, 2012 Crushers ramping up towards designed capacity.

3. Slide 3: Haul trucks and backfilling of previously mined open pit

   3 November 18, 2011 Haul trucks arriving at El Gallo. December 16, 2011 Backfilling of the previously mined open pit begins. March 16, 2012 Loading haul truck. September 14, 2012 Backfilling previously mined open pit.

4. Slide 4: Heap leach pad expansion

   4 February 17, 2012 Heap leach pad expansion gets underway. June 8, 2012 Heap leach pad liner being installed. July 20, 2012 Heap leach pad expansion nears completion. August 3, 2012 Placing gold mineralization onto the heap leach pad.

5. Slide 5: New administration building construction

   5 December 16, 2011 Foundation for the new administration building. January 06, 2012 Walls being constructed at the administration building. March 30, 2012 Administration building nears completion. April 13, 2012 New administration building completed.

6. Slide 6: Haul road upgrade between Palmarito and El Gallo

   6 December 2, 2011 Upgrading the haul road between the Palmarito and El Gallo deposits begins. February 3, 2012 Haul road construction 50% complete. March 16, 2012 Paving of haul road completed. April 13, 2012 Inaugural road opening with Governor Mario Lopez and Rob McEwen.

7. Slide 7: Process plant and ADR equipment construction

   7 March 2, 2012 Constructing interior of the process plant. April 27, 2012 Carbon column installation complete. April 27, 2012 ADR process plant equipment arriving on site. July 6, 2012 Finalizing ADR process plant.

8. Slide 8: El Gallo first gold pour

   8 September 27, 2012 El Gallo first gold pour! MUX McEWEN MINING Proud Member

9. Slide 9: For further information please contact

   MUX For further information please contact: Jenya Meshcheryakova Investor Relations Tel: (647) 258-0395 x 410 Toll Free: (866) 441- 0690 Fax: (647) 258-0408 Email: info@mcewenmining.com Facebook: www.facebook.com/McEwenRob Twitter: www.twitter.com/McEwenMining McEWEN MINING Proud Member

McEwen Mining — Corporate Update (September 2012) on 6ix