Water coming in contact with net acid-producing solid materials in mining environments often results in mining-influenced water (MIW). Diversionary structures are designed to prevent clean water from becoming MIW by coming into contact with mining solid waste (net acid-producing materials) and/or to divert MIW to treatment or collection systems and away from sensitive environments. Diversionary structures can be used to reduce the volume of, or exposure to, MIW that may present risks to human or ecological receptors and that may require treatment. In addition to preventing water from coming in contact with net acid-producing material, diversionary structures can also be used to prevent erosion of mining waste and transport of soluble metals into surface water.