The expansion of renewable energy sources for electricity generation has gained revelance with the energy transition, driven by concerns about fossil fuels and their environmental impacts. However, these sources have an intermittent and seasonal nature, as they depend on resources such as wind and solar irradiation for energy generation. In this context, energy storage emerges as a promising alternative. Pumped-storage hydropower plants, which use water pumping to store energy mechanically, stand out for their high storage capacity and additional benefits, such as high efficiency, fast response time, and long service life. Given the scarcity of studies in this field, this work aims to apply a life cycle assessment (LCA) model to pumped-storage hydropower plants. The methodology includes bibliographic and documental research on the topic, followed by the development of a life cycle assessment model and the execution of an empirical study based on the proposed model, using a closed-loop pumped-storage hydropower plant simulated with the HERA software (PSR, 2018).The results obtained may contribute to the search for solutions to address the issue of intermittency in the power grid and to minimize the environmental and human health impacts associated with these technologies.