Pretium's financial statements says that an internal study was completed in 2012 regarding combining the projects:

"We have entered into a confidentiality and cooperation agreement with Seabridge that, amongst other things, provides for the completion of an engineering study examining the economics of combining our Snowfield Project and Seabridge’s KSM Project as a single operation. The internal engineering study was finalized during the first quarter of 2012 and indicates that developing the KSM and Snowfield deposits together could produce better economics than developing KSM as a stand-alone project, although no property acquisition costs or allocation of initial KSM capital have been considered."

The two combined projects hold 75M ozs of gold (M&I). It's low grade but that still puts it among the largest 3 deposits on earth.