Name of the Project
Gahcho Kué diamond project.

Location
Northwest Territories, Canada.

Client
Gahcho Kué Joint Venture (JV) – a collaboration between De Beers Canada (51%) and Mountain Province Diamonds (49%).

Project Description
Gahcho Kué, which is Chipewyan for ‘a place where big rabbits are found’, is located at Kennady Lake, 280 km north-east of Yellowknife and 80 km east of De Beers’ existing Snap Lake mine, in NWT. The diamond prospect is one of the largest new diamond projects under development globally.

The project consists of the Hearne North and South pipes; the 5034 West pipe, the Central and North-East pipes; the 5034 South pipe; the 5034 North pipe; Wallace; and the Dunn Sheet, Tuzo and Tesla diamondiferous kimberlite pipes, sheets and dykes.

A revised and updated feasibility study on the remote Gahcho Kué has confirmed its robust metrics.

The deposit has current National Instrument 43-101-compliant total probable reserves of 55.5-million carats, contained in 35.4-million tonnes grading 1.57 ct/t.

The mine life has been estimated at 12 years, during which the operation will produce about 53.4-million carats at an average yearly rate of 4.45-million carats. Standard drill-and-blast, and truck-and-shovel equipment and pit designs, will be used.

The average yearly output for the first three years of full production from 2017 to 2019 will be about 5.6-million carats.

Ore will be fed to a three-million-tonne-a-year processing plant, with three stages of crushing, dense-media separation and X-ray/grease diamond-recovery circuits.

Supporting infrastructure includes a 14.1 MW packaged diesel power plant, a 1 350 m gravel airstrip, a five-bay truck shop, an emulsion plant, a 40-million-litre fuel storage facility and a 432-bed accommodation/office complex.

Jobs to be Created
The mine, which comprises three openpits, will employ about 530 full-time employees.

Net Present Value/Internal Rate of Return
None stated.

Value
According to the revised and updated feasibility study, the project will cost C$859-million to construct and the operation will require working capital of C$80-million.

Costs to ramp up the operation to January 2017 have been estimated at C$82-million.

Duration
Production started in 2016.

Latest Developments
De Beers and its joint venture partner Mountain Province Diamonds have officially opened the Gahcho Kué diamond mine, in Canada, which will produce about 54-million carats of rough diamonds over its 12-year mine life.

The mine was opened officially by De Beers Group chairperson and Anglo American CE Mark Cutifani, De Beers Group CEO Bruce Cleaver, De Beers Canada CEO Kim Truter, Mountain Province Diamonds CEO Patrick Evans and representatives of the First Nations and Metis communities in the Northwest Territories on September 21.

Key Contracts and Suppliers
JDS Energy & Mining (feasibility study).

On Budget and on Time?
First production was started on time.

Contact Details for Project Information
De Beers Canada external and corporate affairs tel + 1 416 645 1710.
Mountain Province Diamonds, tel +1 416 361 3562, fax +1 416 603 8565 or email info@mountainprovince.com.