This document discusses utilizing bottom ash as an alternative material for hydraulic stowing in underground coal mines. Bottom ash is a byproduct of coal combustion in thermal power plants. It is coarser and heavier than fly ash, with a gritty, sand-like texture. River sand is commonly used for stowing, but scarcity has made it impractical. Bottom ash shares properties with sand that make it suitable for stowing, such as particle size distribution and permeability. Using bottom ash could provide benefits to both the mining and power sectors by addressing disposal needs and reducing costs. Initial stowing trials using bottom ash showed encouraging results. Further studies are needed but bottom ash shows potential as a viable alternative stowing material.