If Teck was not interested, CUU could have drilled those zones (gathered the ultimate proof) and sold to someone else who's willing to pay up, wait, and have a guaranteed 25% position in this district while Teck is financing Schaft Creek.
Hey I'm sure Anglo is now interested...they just lost a big stake in the Chile copper properties to Codelco:
http://www.vette350.com/2012/08/anglo-american-chiles-codelco-settle.html
And if not Anglo, how about Newmont...:
http://www.vette350.com/2012/08/most-of-peru-region-opposes-newmont-mine.html
Alot of big players out there (Xstrata, Freeport, Glencore, Anta, etc) who would want to secure 25% of this Canadian District. This District speak svolume and many years of very profitable mining, 100+
An dthe list goes on. Just seems like CUU is getting what they want from Teck.