Approval of 15 Mtpa Expansion Project at Proyecto Riotinto

4 December, 2017

Atalaya Mining plc (AIM: ATYM; TSX: AYM), with its subsidiaries, is pleased to announce its decision to proceed with the 15 Mtpa expansion plan at Proyecto Riotinto in south-western Spain.
The 15 Mtpa expansion plan is designed to upgrade processing facilities with the ultimate goal of increasing copper production to approximately 50,000 – 55,000 tonnes per year.

Project Highlights

• The purpose of the 15 Mtpa expansion plan is to increase copper production, improve operational efficiencies, reduce maintenance requirements and lower operating cash costs.
• The expansion plan is designed to deliver processing capacity of up to 15 Mtpa which correlates to an estimated 50,000 – 55,000 tonnes of copper contained in concentrate per year.
• Capital cost has been estimated at €80.4 million consistent with the low capital intensity that the Company has delivered previously at Proyecto Riotinto.

o Expansion project represents capital intensity of approximately US$6,100 per tonne for the expected incremental 15,000 tonnes of copper production over current nameplate.

• Estimated reduction in cash costs and all-in sustaining costs by approximately 7% compared to the existing 9.5 Mtpa operation, based on maintenance and processing efficiencies.
• Subject to completion of financing arrangements and permitting activities, it is anticipated that ground construction works will start during the first quarter of 2018 with commissioning scheduled for the second half of 2019 and nominal production during the first half of 2020.
• Management expects that the expansion project will result in an incremental post-tax net present value (NPV) of approximately US$113 million (assuming an 8% discount rate) and a post-tax internal rate of return (IRR) of approximately 43%, when assuming a US$3.00/lb copper price, US$18.00/oz silver price, and USD:EUR of 1.15.

The 15 Mtpa expansion comprises modernisation of the process plant with the installation of a new primary crushing system, a new SAG mill, additional flotation cells and concentrate handling installations as well as other site infrastructure.
As a result of the positive economic results of the studies, the Board of the Company has approved the start of the early activities required to implement the expansion, including the placing of orders for long-lead equipment.

Alberto Lavandeira, CEO commented:
“Our decision to proceed to upgrade and expand Proyecto Riotinto to processing capacity of 15 Mtpa is based on the strong project economics that demonstrate that significant incremental value can be generated for our shareholders. The project will benefit from the excellent technical experience of our teams which are committed to driving low capital intensity while increasing metal production and mine competitiveness to benefit our shareholders, employees and the local economy.”

Read full announcement: 2017.12.04 – Atalaya – 15 Mtpa Expansion RNS _ FINAL