JDS led Peregrine Diamonds' PEA for the Chidliak diamond project in Nunavut, developing a conventional open pit mine plan with rationalized capital and operating costs. JDS responsibilities included pit and infrastructure design, mine planning, cost estimation, and overall study management. The PEA demonstrated strong economics: after-tax NPV7.5% of C$471M, 29.8% IRR, 2-year payback, 10-year mine life producing 1.2M carats annually (peaking at 1.8M), 1.67 carats per tonne head grade, C$1.3B pre-tax cash flow, and 72% operating margin. Pre-production capital included construction of a 160km all-weather road to Iqaluit.

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