Exhibit 99.1

MCEWEN MINING AND MCEWEN MINING — MINERA ANDES ACQUISITION CORP.

ANNOUNCE RESULTS OF THEIR ANNUAL GENERAL MEETINGS

TORONTO, ONTARIO - (June 1, 2015) - McEwen Mining Inc. (NYSE: MUX) (TSX: MUX) (“McEwen Mining”) and McEwen Mining — Minera Andes Acquisition Corp. (TSX: MAQ) (“ExchangeCo”) are pleased to announce the results of their annual general meetings held on May 28, 2015.  McEwen Mining reports that Robert McEwen, Allen Ambrose, Michele Ashby, Leanne Baker, Richard Brissenden, Gregory Fauquier, Donald Quick and Michael Stein were elected as directors of McEwen Mining.  The shareholders of McEwen Mining also approved the compensation of McEwen Mining’s named executive officers (“Say-on-Pay”), the amendment and restatement of the US Gold Equity Incentive Plan, and re-appointed KPMG LLP as auditors.  ExchangeCo. reports that Nathan Stubina was elected as a director.

Detailed voting results for the re-election of directors of McEwen Mining are as follows:

ExchangeCo. is a subsidiary of McEwen Mining and was formed to facilitate the acquisition of Minera Andes Inc. in 2012.  In connection with this acquisition, ExchangeCo. issued exchangeable shares to holders of Minera Andes shares.  The exchangeable shares are convertible on a one-for-one basis at any time into shares of McEwen Mining.  Holders of exchangeable shares also vote on the same matters as holders of McEwen Mining common shares and their votes are included in the above results.

Detailed voting results for the election of the director of ExchangeCo. are set out below:

McEwen Mining Inc.  |  June 1, 2015

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ABOUT MCEWEN MINING (www.mcewenmining.com)

The goal of McEwen Mining is to qualify for the S&P 500 by creating a high growth gold/silver producer focused in the Americas. McEwen Mining’s principal assets consist of the San José mine in Santa Cruz, Argentina (49% interest), the El Gallo 1 mine and El Gallo 2 project in Sinaloa, Mexico, the Gold Bar project in Nevada, USA, and the Los Azules copper project in San Juan, Argentina.

As of May 28, 2015 McEwen Mining has an aggregate of 300,530,174 shares of common stock outstanding and issuable upon the exchange of the exchangeable shares. Rob McEwen, Chairman and Chief Owner, owns 25% of the shares of the Company (assuming all outstanding Exchangeable Shares are exchanged for an equivalent amount of Common Shares).

McEwen Mining Inc.  |  June 1, 2015

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