Baseline Reports PJM’s Regional Transmission Expansion Plan (RTEP) assesses both near-term five-year needs of the regional power grid as well as those over a 15 year horizon as well. The results of these “baseline” studies identify needed transmission enhancements for anticipated system conditions and define cost allocation assignment. The five-year baseline then provides a starting point from which the need and responsibility for enhancements to accommodate interconnection requests can be identified. Baseline Assessments 2024 PDF 3.28.2025 2023 PDF 3.4.2024 2022 PDF 6.28.2023 2021 PDF 2.1.2022 2020 PDF 2.22.2021 2019 PDF 2.5.2020