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SEPA Process

The State Environmental Policy Act (SEPA) encourages the development of environmentally sound proposals.  The process involves identification and evaluation of probable environmental impacts and the development of mitigation measures to reduce adverse impacts.  

The information on this page is designed for a technical audience.

Chapter 400 of the EPM describes policies that must be considered when conducting the environmental review for SEPA.

SEPA Process Flow Chart

Process Flow Chart

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SEPA Online Handbook provides step-by-step guidance for compliance with SEPA requirements.

Adopting NEPA Documents Under SEPA Rules

As a matter of practice, Project Teams should complete the NEPA and SEPA environmental review process simultaneously in a single document. When a NEPA document is completed without considering SEPA, that NEPA EA/EIS can be adopted using the form found in WAC 197-11-965 . The form/determination notice is signed according to agency SEPA delegations: the ESO Director signs an EIS/EA, the Region/Mode Environmental Manager signs a DNS.

SEPA Register Document Submittal Procedures

Ecology now requires that all SEPA documents be submitted in electronic format.  This includes NEPA documents being adopted under SEPA, DNS, MDNS, DEIS, and Scoping Notices.  The Updated SEPA Register Document Submittal Procedures web page provides guidance and requirements.