FINAL PROGRAMMATIC ENVIRONMENTAL ASSESSMENT AND FINDING OF NO SIGNIFICANT IMPACT/RECORD OF DECISION The Proposed Action includes the redevelopment of the Terminal/Concourse facilities at IAD, expansion of fuel storage facilities, and the development of land referred to as the South Development Area. The Airports Authority’s purpose and need for the Proposed Action being evaluated in this Final Programmatic EA is to: accommodate current and projected passengers with permanent modern facilities that provide an acceptable level of service (LOS), which includes providing sufficient space for passenger facilities, baggage handling systems, space for concessions and other amenities, and efficient connectivity between aircraft gates and other functional areas of the passenger terminal and concourses; provide sufficient fuel storage facilities to meet projected demand with excess capacity for reserve fuel supply requirements; and provide sufficient space to meet the demand for new aeronautical and non-aeronautical support facilities. The Federal Aviation Administration (FAA) is the lead federal agency to ensure compliance with the National Environmental Policy Act of 1969 (NEPA) for airport development actions. The Final Programmatic EA has been prepared pursuant to the requirements of Federal Aviation Administration (FAA) Order 1050.1G, FAA National Environmental Policy Act Implementing Procedures, FAA Order 5050.4B, National Environmental Policy Act (NEPA) Implementing Instructions for Airport Actions, and Department of Transportation’s (DOT) Order 5610.1D, DOT’s Procedures for Considering Environmental Impacts. The FONSI/ROD indicates that the project is consistent with NEPA policies and objectives in that it will not significantly affect the quality of the human environment. The Proposed Action includes potential impacts to 20.6 acres of wetlands and approximately 3,322 linear feet of perennial streams. It is anticipated that the project will qualify for a State Programmatic General Permit and Virginia Water Protection Permit based on further consultation with the United States Army Corps of Engineers and the Virginia Department of Environmental Quality which will include compensatory mitigation for project impacts. IAD_Terminal-Concourse_Redevelopment_EA_FINAL_April_2026.pdf IAD_EA_Appendix_A_Planning.pdf IAD_EA_Appendix_B_Supplemental_Exhibits.pdf IAD_EA_Appendix_C_Alternatives.pdf IAD_EA_Appendix_D_Air Quality.pdf IAD_EA_Appendix_E_Biological_Resources.pdf IAD_EA_Appendix_F_Coastal.pdf IAD_EA_Appendix_G_DOT Section 4(f) - Redacted_0.pdf IAD_EA_Appendix_H_Farmlands.pdf IAD_EA_Appendix_I_HazMat.pdf IAD_EA_Appendix_J_Historical - Redacted_0.pdf IAD_EA_Appendix_K_Land_Use.pdf IAD_EA_Appendix_L_Noise.pdf IAD_EA_Appendix_M_Socio.pdf IAD_EA_Appendix_N_Water_Resources.pdf IAD_EA_Appendix_O_Scoping.pdf IAD_EA_Appendix_P_List of Preparers.pdf IAD_EA_Appendix_Q_Public_Notification&Response_to_Comments.pdf IAD_EA_Appendix_R_References.pdf IAD Terminal Councourse Redevelopment PEA Transmittal Letter (Signed).pdf Hide related content Off Editorial Section(s) Environmental Information