This draft Programmatic Environmental Assessment (PEA) evaluates the potential environmental impacts of repair, rehabilitation, removal, and replacement of dams in Montana, including tribal lands, with a focus on projects eligible for FEMA's High Hazard Potential Dams (HHPD) grant program and related assistance. The document outlines statewide environmental conditions, analyzes alternatives, and details compliance and mitigation measures for dam safety projects. It addresses impacts on physical, biological, cultural, and socioeconomic resources, as well as public health and safety, during both construction and operation phases. The PEA provides a framework for site-specific assessments under NEPA for dam infrastructure projects across Montana.