Oil sands mining operations produce significant quantities of liquid waste materials called tailings. While oil sands companies are expected to reclaim liquid tailings, there has been poor performance to date in addressing this long-term liability. The large inventory of liquid tailings requiring long-term containment has therefore been growing, which has been causing growing concerns for the public and regulators. In 2009 Alberta Energy and Resources Conservation Board (ERCB) released new rules to regulate the reclamation of tailings waste. Oil sands companies were required to submit tailings management plans by September 30, 2009, in accordance with Directive 074: Tailings Performance Criteria and Requirements for Oil Sands Mining Schemes. Executive summary -- 1. Overview of directive 074 -- What are tailings -- Introduction to the directive -- Purpose of the directive -- Requirements to meet directive -- Dedicated disposal areas (DDA) -- Tailings management plans -- 2. Tailings management plan summaries -- Canadian Natural Resources Limited -- Horizon Oil Sands Project -- Imperial Oil Resources -- Kearl Oil Sands Project -- Shell -- Shell Canada Muskeg River Mine -- Shell Albian Jackpine Mine -- Fort Hills Energy Corporation -- Fort Hills Oil Sands Project -- Suncor -- Lease 86/17 and Millennium -- Syncrude -- Syncrude Tailings management plans -- Mildred Lake -- Aurora North -- Aurora South -- 3. Compliance -- 4. Appendix.