Fluor was commissioned in August 1984 to undertake a technical and economic study of the project. This led to further mine planning and metallurgical investigations, which culminated in a preliminary feasibility study in June 1985 and a final feasibility study in August 1987. Fluor updated the database, re-estimated the ore reserves independently, and modified and optimized the open pit designs. Mining sequences, schedules and mining costs were re-estimated and incorporated into the final feasibility study.
Fluor continued to provide mining and computer services including the transfer, plotting and storage of Getchell sampling data for operations. Fluor supervised the grinding test-work program, selected samples, interpreted the results and recommended grinding circuit design and equipment sizes and subsequently completed detail design for the mine, mill and service facilities in late 1988.