Title to the San Jose property is held by Minera Santa Cruz, S.A. ("MSC"), the holding and operating company set up under the terms of an option and Joint Venture Agreement between McEwen Mining Inc. (49%) and Hochschild Mining Argentina (51%), a wholly-owned subsidiary of Hochschild.

The mineralisation at the San Jose property represents a low sulphidation type with quartz sulphide veins with economic silver and gold values and has geological and mineralogical characteristics similar to those of the Company’s Peruvian operations. San Jose commenced operations in June 2007 and the deposit is mined using the cut and fill method. The plant at San Jose has a capacity of 1,500 tonnes per day.

In 2019 silver equivalent production at San Jose was 15,390 koz comprised of 6,846 koz of silver and 105.48 koz of gold production.

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At San Jose, potential drilling was executed at the Aguas Vivas system in the first half with structures corresponding to an intermediate sulphidation system with associated grades of zinc and lead.

Potential drilling was also executed earlier in the year at the Pluma 19 structure, the south-east Kospi projection and East and West Antonella. In Q3 2019, just over 5,000m of potential and inferred resource drilling was carried out with the majority concentrating on an area including the Kospi, Kospi South East, Ramal Huevos Verdes and the new Milagro structures. The team has also executed a 1,800m long drill hole to the west of Huevos Verdes. Towards the end of the year, further potential drilling was carried out at the Micaela, Ayelen extension, Kospi Norte and Tonio veins. Finally, almost 4,000m of resource drilling was executed around the current operations.

A magnetometry study was performed on the potential extension of Cerro Negro structures (Telken) covering a total area of 14.3km².

In 2020, the programme at San Jose involves further long hole drilling, a Titan geophysics programme to the south, 5,000m of drilling at the Telken structures close to Cerro Negro and an assessment of the regional opportunities also to the south of the land package.