The 'lock-up' of gold in run-of-mine mills - SAIMM. ventional forward-leaching practices, the comminution of the ore being carried out in (4,27 m dia. by 7,32 m) run-of-mine mills. The Millsite Gold Plant, originally. Get Price; Wade's Gold Mill | Rates and Schedules. Wade's Gold Mill, Hill City, South Dakota - The Heart of the Black Hills.