In this collaboration between GridLab and Telos Energy, we evaluated resource adequacy across the Eastern Interconnection using the open-source modeling platform, GridPath, and publicly available datasets. With a near-term study year of 2028, we analyzed the role of interregional transmission in mitigating loss of load risk across diverse regions under varying system conditions. The results highlight how coordinated planning and regional diversity can enhance reliability, particularly in the face of load growth, resource retirements, and growing weather-driven risk. The analysis has policy and planning implications for resource adequacy programs and transmission development, and has resulted in an publicly available Eastern Interconnection GridPath model that can be used for future analysis by multiple stakeholders. The project results were shared publicly in a webinar hosted by the Energy Systems Integration Group. (Webinar link)