Abstract
Hard rocks with high shear strength are used for structural material of rock zones of a rockfill dam with central clay core. To obtain such hard rocks from deep underground, surface soil and weathered rock have to be excavated and then be disposed of as waste. The more the disposal, the higher the cost of dam construction. To reduce the cost, the disposal should be minimized by utilizing such waste material for dam material. This paper describes a case history of the minimization of the disposal, that is the maximization of utilized waste material, with the help of multiple regression analysis.
