Duckabush Estuary Restoration Environmental Review

WDFW led the state environmental review of the proposed project and prepared a Supplemental Environmental Impact Statement (SEIS) to identify and evaluate how the proposed project would likely affect the environment.

The Final Supplemental Environmental Impact Statement was released on May 15, 2020, and includes responses to comments received (see chapter 5 of the Final SEIS).

What is a Supplemental EIS and why was it prepared? 

A Supplemental Environmental Impact Statement (SEIS) is a document that adds to a previously published EIS to provide more information about specific environmental impacts or to explore additional alternatives.

A federal environmental review of the Duckabush Estuary Restoration Project was completed in 2016 to satisfy requirements of the National Environmental Policy Act (NEPA). The federal EIS documents are provided below (see NEPA documents). WDFW elected to conduct an additional environmental review, and initiated a supplemental EIS process in June 2019.

The state environmental review led by WDFW includes:

  • Issue a Determination of Significance
  • Adopt the NEPA EIS
  • Prepare a Supplemental EIS to provide additional information and analysis of site-specific environmental impacts.
Duckabush SEPA Timeline

A 30-day scoping period was held from June 27, 2019, through July 26, 2019. This scoping period allowed WDFW to identify issues and alternatives to be evaluated in the Supplemental EIS by inviting the public, other agencies, and tribes to submit comments about the environmental scope of the analysis.

WDFW selected four key environmental elements for additional analysis in the draft SEIS based on interest during the scoping process with focus on specific sub-elements of each: Water; Plants & Animals; Transportation; and Noise.  

A 30-day public comment period on the Draft SEIS was held from Jan. 21, 2020, through Feb. 20, 2020.  

A final SEIS was prepared that contains the responses to the comments and provides additional updates as appropriate. WDFW released the final draft SEIS on May 15, 2020. 

Additional information about WDFW’s SEPA process is available on the WDFW SEPA webpage. For further detail about SEPA, visit the Washington Department of Ecology’s SEPA webpage. Additional commenting guidance is available at the Washington Department of Ecology’s Citizen's Guide to SEPA Review