In operation between 1934 and 1988, Ross Mine produced over 1 million ounces of gold. It was owned, at closing, by Pamour Porcupine Mines, Ltd.
UPDATE July 5, 2012: Thanks to the heads-up from Jay's comment below, I discovered that the property is about to see action again. Guardians of Gold plan to reprocess the tailings behind the mine to remove trace amounts of gold.
As it stands today, it is almost exactly as it was the day it closed. The shaft is not capped, and all outbuildings remain pretty much pristine.