DMC Mining Services (UK) Ltd and DMC Mining Services Ltd – both subsidiaries of KGHM Polska Miedź have confirmed they have entered into a contract with York Potash Ltd, a subsidiary of Sirius Minerals PLC, to engineer and construct four shafts at the client’s polyhalite (a potash mineral) project in North Yorkshire, United Kingdom. Those shafts include a production and service shaft, each approximately 1,500 m deep and two smaller shafts associated with the materials transport system, each approximately 350 m deep.

“DMC will sink the deep shafts using modern shaft boring roadheader (SBR) technology, in lieu of conventional drilling and blasting, to enhance performance, quality and schedule. DMC is a leading provider of shaft sinking services using SBR technology and this project will further enhance its position as a leading provider of mining services using optimised technological solutions. For over 35 years DMC has delivered a comprehensive list of mining services, ranging from shaft sinking and raise boring, to full mine development and operation. Such services have been applied successfully at large-scale mining sites for gold, nickel, copper, potash, zinc and other metals and

minerals.”

Sirius Minerals Plc is listed on the London Stock Exchange and is permitted to develop the Woodsmith polyhalite mine, with associated infrastructure, for the extraction of 10 Mt of polyhalite annually in the first phase of the project. Sirius Minerals Plc conducts the investment through York Potash Ltd, which is the direct owner of the project.