NEPA & SEPA

Use this guidance to prepare environmental documentation that complies with the National and State Environmental Policy Acts (NEPA and SEPA).

Scoping project documentation requirements 

Read Environmental Manual Chapter 300: Project scoping & programming (PDF 329KB) to learn more about determining a project's federal nexus and class of action. 

Refer to the NEPA Environmental Documentation Toolkit (PDF 4.1MB) for procedures, guidance, flow charts and legal considerations to assist with preparing NEPA documentation. 

Federal nexus and lead agency

Determine whether your project has a federal nexus, which means it has federal participation through funding or decisions/approvals. Use the Determining When NEPA is Necessary and Federal Agency Nexus flowchart (PDF 4.1MB) to help with this decision. 

Most guidance on this page applies to projects where the Federal Highway Administration (FHWA) is the federal lead agency. If another federal agency has approval authority or provides funding, coordinate with that agency to understand its environmental review requirements. Some agencies may accept the environmental documentation prepared under FHWA’s NEPA process.

Coordinate early with WSDOT Real Estate Services when federal agency-owned property may be affected to avoid preventable post-NEPA discoveries and documentation strategy changes. Additional right of way needs involving agencies such as the Federal Aviation Administration (FAA) or Bureau of Indian Affairs (BIA) may trigger additional federal coordination or NEPA documentation requirements. 

Use the NEPA SEPA Document Distribution Matrix (PDF 186KB) to identify contacts at BIA and other federal, state, and local agencies. 

Use the Federal Agency Compliance Requirements (PDF 4.1MB) to understand which regulations your project must comply with based on WSDOT's most common federal nexus types. 

Determine NEPA/SEPA strategy 

Use the NEPA/SEPA strategy checklist (PDF 739KB) to help understand the potential environmental documentation strategy. 

Use the Identifying NEPA Class of Action section in the NEPA Documentation Toolkit (PDF 4.1MB) to help decide whether the project will require a Categorical Exclusion (CE), Environmental Assessment (EA), or Environmental Impact Statement (EIS). 

Check for past environmental documents related to your project. Reference, incorporate, or append any relevant information to the environmental document. 

Tribal consultation

Use the Model Comprehensive Tribal Consultation Process for the National Environmental Policy Act to understand when and how to consult with Tribes during environmental review. Consultation requirements vary based on project classification and potential effects on Tribal interests. 

Corps permit

Projects without an FHWA or Federal Transit Administration (FTA) nexus that require a U.S. Army Corps of Engineers (Corps) permit should follow Corps Federal Nexus and Jurisdiction for WSDOT NEPA (PDF 897KB). 

Access ERS

Use Environmental Review Summary (ERS) to document your environmental scoping as part of the Project Summary package. Copy this information into an Environmental Classification Summary (ECS) when the project is programmed (preliminary design), which becomes your NEPA document for Categorical Exclusion (CE) projects. 

Staff with a WSDOT login, follow these directions to gain access to ERS-ECS:
    1. Contact region IT to have ‘TEIS Capital Projects’ system installed. 
    2. Contact hqithelpdesk@wsdot.wa.gov for access.
    3. Launch the application to activate your account.
    4. Contact NEPA-SEPA@wsdot.wa.gov to be added to the environmental group.

Planning and Environmental Linkages (PEL)

PEL studies are conducted through a federal process used for some projects that are likely to require a NEPA Environmental Assessment (EA) or Environmental Impact Statement (EIS). If your NEPA document included a pre-NEPA PEL study, coordinate with the NEPA/SEPA Program and PEL team on the PEL-to-NEPA transition. Review the PEL webpage for more information on PEL. 

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