The management of large volumes of coal combustion residues ccrs is a challenge for utilities because they must either place the ccrs in landfills surface impoundments or mines or find alternative uses for the material this study focuses on the placement of ccrs in active and abandoned coal mines. Managing coal combustion residues in mines the burning of coal in electric utility plants produces not only power but also residues that contain constituents that may be harmful to the environment the management of large volumes of coal combustion residues ccrs is a challenge for utilities. 2 managing coal combustion residues in mines sidebar s1 statement of task in response to a request from congress the national research council conduct ed a study that examined the health safety and environmental risks associated with using coal combustion wastes ccwsa for reclamation in active and abandoned coal mines. 22 managing coal combustion residues in mines sidebar 13 statement of task in response to a request from congress the national research council con ducted a study that examined the health safety and environmental risks associat ed with using coal combustion wastes ccwsa for reclamation in active and aban doned coal mines