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SEPA Documents
Seattle-Tacoma International Airport Comprehensive Development Plan (CDP) Final Environmental Assessment and Finding of No Significant Impact

There is no comment period asssociated with these documents.

Notices

• Notice of Availability (193 KB, PDF)
• Notice of Adoption (140 KB, PDF)

Main Document

• Cover Letter (158 KB, PDF)
• Finding of No Significant Impact (FONSI) (335 KB, PDF)
• Main Document (47 MB PDF)

Appendices

• Appendix A - Public and Agency Coordination (19 MB PDF)
• Appendix B - Aviation Activity Projections (1 MB PDF)
• Appendix C - Project Layout Drawings (34 MB PDF)
• Appendix D - Comparison of Potential Alternatives (660 KB PDF)
• Appendix E - Noise Analysis (7 MB PDF)
• Appendix F - Land Use (2 MB PDF)
• Appendix G - Socioeconomic Existing Conditions (1 MB PDF)
• Appendix H - Surface Transportation (2 MB PDF)
• Appendix I - Air Quality (2 MB PDF)
• Appendix J - Water Resources (16 MB PDF)
• Appendix K - Fish, Wildlife and Plants (23 MB PDF)
• Appendix L - Wetlands (23 MB PDF)
• Appendix M - Hazardous Materials and Solid Waste (163 KB PDF)
• Appendix N - Historial Property Survey (3 MB PDF)