ICARD-IMWA 2015 is organized to provide an international forum where mining professionals, operators, researchers and suppliers can meet to exchange, interact, analyze and discuss experiences and recent innovations in the area of sound and responsible mine water and effluent management. These proceedings contain 220 abstracts of papers and posters written by authors from 24 countries. The main topics addressed by the abstracts included in these proceedings are: Geomicrobiology, biogeochemical cycles and biomining; Applied mineralogy and geoenvironmental units; Prediction of drainage flow; Prediction of drainage chemistry; Mine water and drainage collection and treatment; Cover design and performance; Scaling from laboratory to field studies; Reliable mine waste management; Reliable mine water operation; Mine dewatering; Mine water management for closure; Mine water geochemistry and Pit lakes.