Raven Project PAH Feasibility Report If you examine the "Technical Report" posted June 8, 2011, by CEC consultants PAH, there's a lot of wording that would suggest more information is needed to make the feasibility study complete.
"Mining studies are largely complete to bankable feasibility level; however, work in some areas is still ongoing ( Page 20.1)
"Areas of uncertainty in engineering design that must be resolved to FINALIZE the bankable feasibility include the following: reject geochemistry to determine if reject material is potentially acid-generating; groundwater inflows and geochemistry to determine underground water managment; water treatment requirements, if necessary. (Pages 20.1)
This mine is being proposed on the basis of reserves that are not proven, as 51% of the coal that is expected to be extracted falls into the "probable", not "proven category as indicated by Table 17-4 on Page 17.12 of the PAH Report. This should be concerning and signal a need for a risk assessment on the effect of running into unanticipated geological complexities that will be detrimental to the project's economics and it's ability to fulfill committments on mitigating environmental impacts.
BOTTOM LINE: A lot more information needs to be published so investors can make an educated decision on the merits of this project. In my humble opinion.....