heap leach solution? The mines run by goldcorp, barrick and kinross in the YNG area all use heap leaching as their primary processing. They would certainly run into the problem of running fluid through the ore during winter. Now that YNG's mill is fully-functional year round, it would be tempting to add that to their process.
I think heap leaching has a recovery rate of about 90%. I think the YNG mill would be better.
Just thinking...