To support the development of its 2021 Integrated Resource Plan (IRP), Omaha Public Power District (OPPD) engaged E3 to perform a comprehensive study on various pathways for OPPD to achieve net zero carbon by 2050. With a goal of net zero carbon emissions by 2050, OPPD sought a study to understand different pathways to achieve their target emissions, reliability, costs, and generation. E3’s study consisted of three primary phases: multi-sector modeling using the E3 PATHWAYS model to develop multiple electricity sector demand forecasts; reliability and resiliency analysis using the E3 RECAP model; and portfolio optimization using the E3 RESOLVE model to develop cost-optimal electricity portfolios that achieved both net-zero carbon and target reliability by 2050. E3 found that OPPD can achieve net zero while balancing affordability and reliability and that all net zero pathways require a cessation of coal generation and reduced use of fossil generation. A mix of new low-carbon resources including renewable energy, energy storage, and community-wide energy efficiency will be required as well as firm capacity resources, which will be needed to maintain resource adequacy.