EX-99.1 2 a12-12803_2ex99d1.htm EX-99.1

Exhibit 99.1

| May 25, 2012

Dear McEwen Mining Shareholders,

Please find below the El Gallo Complex development update.

Key development highlights over the past two weeks are:

· Installation of clay foundation and heap leach liner well underway

· Process plant construction nears completion

· Crushing plant construction 70% complete

To view the El Gallo Development Photo Update, please click here.

For further information contact: |
Jenya Meshcheryakova Investor Relations Tel: (647) 258-0395 ext 410 Toll Free: (866) 441-0690 Fax: (647) 258-0408 | Mailing Address 181 Bay Street Suite 4750 Toronto ON M5J 2T3 P.O. Box 792 E-mail: info@mcewenmining.com

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| MUX El Gallo Complex Development Photo Update May 25, 2012 MCEWEN MINING

| 2 Applying clay foundation.

| 3 Installing heap leach liner.

| 4 Installing heap leach liner.

| 5 Cutting pipes for heap leach.

| 6 Diesel generator building for process plant.

| 7 Installation of process equipment.

| 8 Diesel storage for process plant.

| 9 Over 3 million tonnes mined since December.

| 10 Operating team.

| 11 Crushing plant assembly.

| 12 Crushing plant assembly.

| 13 Crushing plant assembly.

| 14 Crushing plant assembly.

| 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 MCEWEN MINING