Underground vs. Open pit; This statement was posted in the scoping EIS.

2.4.1 Mining Technologies
Underground Mining – This alternative will evaluate the feasibility and environmental impacts associated with using underground mining techniques to mine the NorthMet ore deposit. Although there may be environmental benefits associated with a smaller footprint from an underground mine, the cost of using underground mining techniques on the diffuse ore body may impact the feasibility of the project. If the cost of developing an underground mine were so high that the proposer could not develop the project, this alternative would not meet the purpose of the project. Due to this situation the economic feasibility will be evaluated by a third party contractor prior to any further assessment of this alternative. If the cost of underground mining is feasible at a lower economic return, the environmental impacts will be assessed to determine if there would be significant environmental benefits.