The study examined the effects of the coal phase-out act on lignite-based power generation in the Rhenish mining area. The study focuses on an estimation of the lignite demand for electricity and heat supply of the Niederaussem, Neurath and Weisweiler power plants in the period 2021 to 2038. In addition, the effects of the planned coal phase-out on the development of national generation capacities, electricity generation, import balance, greenhouse gas emissions and wholesale electricity prices are analyzed.