Name and Location
Jay kimberlite pipe project, Northwest Territories, Canada.

Client
Dominion Diamond Corporation.

Project Description
The Jay kimberlite pipe is located in the south-eastern portion of the Ekati mine property, about 25 km south-east of the Ekati main facilities and about 7 km to the north-east of the Misery pit, in the Lac de Gras watershed. The Jay project is an extension of the Ekati mining operation and can potentially extend the mine life to about 2030, more than ten years beyond the current closure date. The facilities required to support the development of the project and to process the kimberlite already exist at the Ekati operation. The project entails the construction of a water-retention dike following a horse-shoe-shaped alignment from the shoreline into Lac du Savage to isolate the portion of the lake overlying the Jay pipe. The dike would be 5 km long with an average water depth of 5 m.

Net Present Value/Internal Rate of Return
Not stated.

Value
Not stated.

Duration
The project timeline currently envisions the construction of the dike to start in mid-2016 and to continue until 2019. Dewatering and prestripping will then take place, followed by conventional openpit mining, with production currently expected to begin in 2020.

Latest Developments
Dominion announced in November 2014 that it had filed the developer’s assessment report (DAR) with the Mackenzie Valley Environmental Impact Review Board for the Jay kimberlite pipe. The purpose of the DAR is to meet the requirements set out by the review board for the environmental assessment process. The submission of the DAR is the next step in the permitting process to develop the largest diamondiferous resource in North America. Following the submission of the DAR, the analytical and hearing phases of the environmental assessment process are expected to result in a Ministerial decision in late 2015. Once this decision is issued, the water licence and land-use permitting process will take about a further six months.

Key Contracts and Suppliers
None stated.

On Budget and on Time?
Not stated.

Contact Details for Project Information
Dominion diamond corporation VP – corporate development Richard Chetwode, tel +44 7720 970 762 or
email rchetwode@ddcorp.ca.