Check this out-

old feasibility study (2012)

copper prices used:

3.25US=3.25CA

Exchange rate was at parity (1:1)

Today’s copper prices (2018)

New Copper if used:

Exchange rate 1:1.29

2.87US=3.70CA

Economics to SC is big (45 cent difference in change on the upward to value)

plus.....

1) waste rock conversion to generating ore

2) extra M&I resources (hundreds of millions in tonnage) not included in pit due to safety issues

3) Higher metal recovery rates and reduced costs (capex and opex)

4) Exploration potential- SC not properly delineated. Deposit open in all directions plus near mineralized zones 

Many added billions to SC economics!! It boggles my mind how big or profitable this asset could be.