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Environmental Impact Statements (63 publications 1976-2020)


Title (link to summary)NumberDate (released or updated)
Summary of Draft Environmental Impact Statement for the Proposed Chehalis River Basin Flood Damage Reduction Project 20-06-002February 2020
Hoja informativa del proyecto de control de inundaciones y manejo de sedimentos de Swift Creek 19-09-167ESSeptember 2019
Final Environmental Impact Statement Short-term modification of the total dissolved gas criteria in the Snake and Columbia Rivers 19-10-019March 2019
Draft Environmental Impact Statement Short-term modification of total dissolved gas criteria in the Snake and Columbia Rivers 19-10-013January 2019
Final Environmental Impact Statement - Washington State's Changes to Water Quality Standards for Surface Waters of Washington State - WAC 173-201A 18-10-041January 2019
Supplemental Draft Environmental Impact Statement (SDEIS) for Kachess Drought Relief Pumping Plant (KDRPP) and Keechelus Reservoir-to-Kachess Reservoir Conveyance (KKC) 17-12-021April 2018
Supplemental Environmental Impact Statement for Control of Burrowing Shrimp using Imidacloprid on Commercial Oyster and Clam Beds in Willapa Bay and Grays Harbor, Washington - DRAFT 17-10-027September 2017
Chehalis Basin Strategy Final Programmatic Environmental Impact Statement (EIS) 17-06-019June 2017
Millennium Bulk Terminals – Longview Final Environmental Impact Statement (EIS) 17-06-013April 2017
Shell Anacortes Rail Unloading Facility Draft Environmental Impact Statement (EIS) 17-06-022October 2016
Chehalis Basin Strategy Draft Programmatic Environmental Impact Statement (EIS) 17-06-017September 2016
Westway Expansion Project Final Environmental Impact Statement (EIS) 17-06-012September 2016
Final EIS - Dungeness River Agricultural Water Users Association Comprehensive Water Conservation Plan 04-06-010July 2016
Draft Environmental Impact Statement - Revised: Washington State’s Proposed Changes to Water Quality Standards for Surface Waters of the State of Washington – WAC 173-201A 16-10-004January 2016
Final Environmental Impact Statement Control of Burrowing shrimp using Imidacloprid on Commercial oyster and Clam Beds in Willapa Bay and Grays Harbor, Washington 15-10-013April 2015
Kachess Drought Relief Pumping Plant and Keechelus Reservoir-to-Kachess Reservoir Conveyance Draft Environmental Impact Statement 15-12-001January 2015
Environmental Impact Statement - Washington State's Proposed Changes to Water Quality Standards for Surface Waters of the State of Washington - WAC 173-201A--DRAFT 14-10-060January 2015
Final Environmental Impact Statement: Management of Zostera Japonica on Commercial Clam Beds in Willapa Bay, Washington 14-10-050March 2014
Sediment Management Standards - Environmental Impact Statement 12-09-054February 2013
Odessa Subarea Special Study Final Environmental Impact Statement 12-12-014April 2012
Yakima River Basin Integrated Water Resource Management Plan Final Programmatic Environmental Impact Statement 12-12-002March 2012
Environmental Impact Statement for Penoxsulam, Imazamox, Bispyribac-sodium, Flumioxazin, & Carfentrazone-ethyl: Addendum to the Final Supplemental Environmental Impact Statement for Freshwater Aquatic Plant Management 00-10-040Addendum1January 2012
Draft Programmatic Environmental Impact Statement for the Yakima River Basin Integrated Water Resource Management Plan. 11-12-024November 2011
Cle Elum Dam Fish Passage Facilities and Fish Reintroduction Project FEIS 11-12-030April 2011
Non-Project Environmental Impact Statement Aquatic Invasive Species Control 10-10-010April 2011
Condit Dam Removal, Final Second Supplemental Environmental Impact Statement 09-12-017January 2010
Addendum to the Final Supplemental Environmental Impact Statement for the Lake Roosevelt Incremental Storage Releases Program 09-12-012December 2009
Final EIS, Yakima River Basin Integrated Water Resource Management Alternative 09-12-009June 2009
Condit Dam Removal, Draft Second Supplemental Environmental Impact Statement 09-12-008June 2009
Final Supplemental Environmental Statement for the Lake Roosevelt Incremental Storage Releases Program 08-11-034August 2008
Draft Supplemental Environmental Impact Statement for the Lake Roosevelt Incremental Storage Releases Program 08-11-012May 2008
Final Programmatic Environmental Impact Statement For The Columbia River Water Management Program (Volume II) 07-11-009-v2February 2007
Final Programmatic Environmental Impact Statement For The Columbia River Water Management Program (Volume I) 07-11-009-v1February 2007
Small Business Economic Impact Statement For Proposed Amendments to Chapter 173-308 WAC, Biosolids Management 07-07-005January 2007
Obsolete -Draft Programmatic Environmental Impact Statement For The Columbia River Water Management Program 06-11-030October 2006
Draft Environmental Impact Statement:Columbia River Mainstem Water Management Program 04-11-031December 2004
Supplemental Environmental Impact Statement Assessments of Aquatic Herbicides: Volume 5: Triclopyr 04-10-015June 2004
Environmental Impact Statement (EIS) for Permitted Use of Triclopyr 04-10-018May 2004
Final EIS - Dungeness River Agricultural Water Users Association Comprehensive Water Conservation Plan 03-11-016November 2003
Final Supplemental Environmental Impact Statement for Diquat Dibromide 02-10-052November 2002
Herbicide Risk Assessment for the Aquatic Plant Management Final Supplemental Environmental Impact Statement -- Appendix D -- Volume 2: Endothall 00-10-044February 2001
Herbicide Risk Assessment for the Aquatic Plant Management Final Supplemental Environmental Impact Statement -- Appendix C -- Volume 3: 2,4-D 00-10-043February 2001
Final Supplemental Environmental Impact Statement for Aquatic Plant Management -- Appendix B -- State Water Pollution Control Laws and Washington’s Administrative Codes Governing the Use of Aquatic Pesticides 00-10-042February 2001
Final Supplemental Environmental Impact Statement for Aquatic Plant Management -- Appendix A -- Ecology’s Water Quality Modification Process, Sample Application Form and Permit 00-10-041February 2001
Final Supplemental Environmental Impact Statement For Freshwater Aquatic Plant Management 00-10-040February 2001
Model Toxics Control Act Proposed Rule Amendments - Final Environmental Impact Statement 2001 00-09-055January 2001
Puget Sound Confined Disposal Site Study : Programmatic Environmental Impact Statement : Final Volume II of II 99-09-903October 1999
Puget Sound Confined Disposal Site Study : Programmatic Environmental Impact Statement : Draft 99-09-900February 1999
Small Business Economic Impact Statement -- 1995 NPDES and State General Permits for Storm Water Discharges Associated with Industrial Activities and Construction Activities 95-67September 1995
Final Environmental Impact Statement - The Use of Dispersants as a Management Tool for Controlling Oil Spills 93-34June 1993
Comments on the Amendments to the Model Toxics Control Act Cleanup Regulation Chapter 173-340 WAC and the Draft Environmental Impact 91-09-902February 1991
Final Environmental Impact Statement of Cleanup Standards: Amendments to the Model Toxics Control Act Cleanup Regulation, Chapter 173-340 WAC 91-09-919January 1991
Final Environmental Impact Statement:Cleanup Standards:Amendments to the Model Toxics Control Act Cleanup Regulation Chapter 173-340 WAC 91-09-900January 1991
Final Environmental Impact Statement For the Washington State Sediment Management Standards 90-50December 1990
Draft Environmental Impact Statement:Cleanup Standards:Technical Appendices 90-09-916July 1990
Draft Environmental Impact Statement : Cleanup Standards 90-09-915June 1990
Adoption of Cleanup Standards Under the Model Toxics Control Act 89-09-926December 1989
PSDDA Reports : Final Environmental Impact Statement Unconfined Open-Water Disposal for Dredged Material, Phase II (North and South Puget Sound) (Nepa/Sepa) 89-09-911September 1989
Final Environmental Impact Statement: Use of the Insecticide Sevin to Control Ghost and Mud Shrimp in Oyster Beds of Willapa Bay and Grays Harbor 85-10-201June 1985
Final Environmental Impact Statement (Including Program Overview) 79-11-005April 1979
Environmental Impact Statement - John Day/McNary Pools, Columbia River 77-11-004December 1977
Final Environmental Impact Statement - Colville River Basin Management Plan and Regulation 77-11-005August 1977
Final Environmental Impact Statement 76-11-008March 1976