Development of a controlled low-strength material (CLSM), used as backfills from excavated soil and industrial by-product is main aim of the present paper. In the CLSM mixtures, stainless steel reducing slag partially substitutes for Portland cement with different percentages (e.g., 0 percent, 10 percent, 20 percent, and 30 percent); fine aggregate was provided by well mixing river sand and soil with a selected proportion (e.g. 6:4 by volume). A laboratory study was conducted to investigate the properties of these mixtures for fresh and hardened states. Testing results indicated that the proposed mixtures satisfy the requirements of excavatable CLSM; and the range of compressive strength, and friction angle are comparable with those of densely sandy soil.