Waste rock definition
/What is Waste Rock?
Waste rock is barren or marginal ore that has been mined, but which has so little value that it is not worthwhile to engage in additional treatment, so it is discarded. Waste rock is usually removed in order to gain access to a commercially-producible mineral deposit.
Accounting for Waste Rock
If waste rock is being removed to gain access to a mineral deposit, then the cost should be capitalized along with other development costs and amortized over the life of the mine. If the removed waste rock does not provide access to a commercially-producible mineral deposit, then the related cost should be charged to expense as incurred.