NEPA & SEPA guidance
Use the guidance on this page to appropriately disclose potential project impacts through the NEPA and SEPA (National and State Environmental Policy Acts) processes for Washington State Department of Transportation (WSDOT) environmental documents. Documents prepared under Local Programs (LP) should visit the LP Environmental Services webpage.
Read Environmental Manual Chapter 400: Environmental Review and Transportation Decision Making (PDF 592KB) to learn more about our NEPA and SEPA processes as shown in the graphic below.
View this graphic for an overview of the NEPA process (PDF 505KB).
Documenting environmental impacts through NEPA
The level and type of analysis required for a project varies by discipline and depends on the significance, complexity and contextual setting of the actions being taken. Although most of the agency’s projects fit categories of exclusion, the complexity of the EA/EIS processes requires more guidance.
Before you begin documenting project impacts, read these documents to understand the Washington State Department of Transportation’s (WSDOT) role in the environmental documentation and review process of a federal project:
The FHWA Stewardship and Oversight Agreement with WSDOT (PDF 1MB) documents roles and responsibilities related to project approvals and methods of oversight to deliver the Federal-aid Highway Program in accordance with Federal requirements.
The Federal Nexus Requirements (PDF 736KB) table can help you understand which regulations your project must comply with based on your federal nexus.