The Onaping Depth Project is a nickel/copper underground mine project currently in execution by Glencore's Sudbury Integrated Nickel Operations. The Onaping Depth orebodies will be accessed via the existing Craig Mine workings after completion of sinking a winze from 1,200 to 2,640m below surface. Due to the final depth of the workplace, a 16 MW(R) underground refrigeration plant will be operated at a depth of 1,915m below surface to provide conditioned air to the workplace throughout the project development and life of mine production phases. This paper will provide an update on the design, construction and commissioning of the underground refrigeration plant, including lessons learned in the contracting and construction methodologies.
