this study investigated the feasibility of using coal/biomass fly ash (cbfa) blended with various percentages of mine tailings, bentonite, and glacial till soil to control and treat acid mine drainage (amd). applications included their use as a cover (cap), liner, low permeability core for dams, and flow-through reactive barriers. these materials were chosen due to their availability and their potential to be a cost effective alternative to traditional technologies and materials.