RE:What good is a tailings design with no ore. "The draft Environmental Impact Statement (EIS) for the proposed Pebble Mine estimates that it will generate an average of 6.8 billion gallons per year of waste water during operations and 11.8 billion gallons per year during closure, requiring capture and treatment. The waste water will contain metals and other pollution harmful to fish and public health."
Add another ~1-2 billion gallons per year requiring treatment and discharge meeting aquatic standards during both operations and closure. No mining company will assume this liability.