With zero improvements from Teck yet to be applied to the Scahft Creek project and zero updates to an official valuation from them in their 11 years as operator, a Schaft Creek valuation update based solely on current metal prices gives us:

CU:  $4.25 - $3.25 = $1.00 where each $0.25 increase in CU price increases NPV by $240 M US 
Equals an additional $960,000,000 US to be added to NPV

AU:  $2,600 - $1,500 = $900 where each $100 increase in AU price increases NPV by $80 M US
Equals an additional $880,000,000 US to be added to NPV

MO:  $30.7 - $10 = $20.7 where each dollar increase in MO price increases NPV by $40 M US
Equals an additional $830,000,000 US to be added to NPV

The 2012 (non-optimized project) NPV is $840,000,000.  Add the above NPV adjustments for current prices and you get an updated NPV of $3,510,000,000 US or $4,756,000,000 CAD  

If we used $4.50 CU like that other project just did, Schaft Creek's NPV moves to $5,067,000,000 CAD.

25% equals $1,267,000,000 CAD or $2.27 / CUU share.

Imagine how much more the project would be worth if Teck actually acted in good faith as an operator and publicized 11 years of their studies and optimizations.