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Environmental and Reports

Environmental Documents

Alaskan Way Viaduct Replacement Project

Record of Decision - August 2011
Final Environmental Impact Statement and Section 4(f) - July 2011
Supplemental Draft Environmental Impact Statement and Draft Section 4(f) - October 2010
Supplemental Draft Environmental Impact Statement - July 2006
Draft Environmental Impact Statement - March 2004

South Holgate Street to South King Street Viaduct Replacement Project

Finding of No Significant Impact - February 2009
Environmental Assessment - June 2008

Battery Street Tunnel Fire and Safety Improvements Project

SEPA Checklist - October 2008

South Massachusetts Street to Railroad Way South Electrical Line Relocation

SEPA checklist - February 2008

Alaskan Way Viaduct Replacement Project | (August 2011)

Record of Decision

Record of Decision (pdf 1.7 mb)
Section 106 Memorandum of Agreement (pdf 510 kb)
Final EIS Comments and Responses (pdf 23 mb)

Alaskan Way Viaduct Replacement Project | (July 2011)

Final Environmental Impact Statement and Section 4(f)

Cover/Table of Contents (pdf 1.8 Mb)
Summary (pdf 9 Mb)
Chapter 1 - Introduction (pdf 1.4 Mb)
Chapter 2 - Alternatives Development (pdf 1.5 Mb)
Chapter 3 - Alternatives Description (pdf 3 Mb)
Chapter 4 - Project Area (pdf 7 Mb)
Chapter 5 - Permanent Effects (pdf 13 Mb)
Chapter 6 - Construction Effects (pdf 2 Mb)
Chapter 7 - Cumulative (pdf 1.1 Mb)
Chapter 8 - Mitigation (pdf 936 Kb)
Chapter 9 - Comments (pdf 1.1 Mb)
Final Section 4(f) Evaluation (pdf 1.3 kb)
Acronyms/References/Index (pdf 777 kb)
Complete EIS Chapters - single file download (pdf 42.2 Mb)

Appendices:

Public involvement Discipline Report (pdf 1.4 mb)
Alternatives Description and Construction Methods (pdf 2.9 mb)
Transportation Discipline Report (pdf 22 mb)
Visual Quality Discipline Report (pdf 2.1 mb)
Visual Simulations (pdf 10 mb)
Noise Discipline Report (pdf 2.1 mb)
Land Use Discipline Report (pdf 5.7 mb)
Social Discipline Report (pdf 7.2 mb)
Historic, Cultural, and Archaeological Resources (pdf 9.8 mb)
Section 4(f) Supplemental Materials (pdf 1.6 mb)
Public Services and Utilities Discipline Report (pdf 1 mb)
Economics Discipline Report (pdf 1.7 mb)
Air Discipline Report (pdf 1.8 mb)
Wildlife, Fish and Vegetation Discipline Report (pdf 965 kb)
Surface Water Discipline Report (pdf 3.2 mb)
Earth Discipline Report (pdf 2.4 mb)
Hazardous Materials Discipline Report (pdf 1.2 mb)
Energy Discipline Report (pdf 1.2 mb)
2004 Draft EIS and 2006 Supplemental Draft EIS Comments and Responses
Part I (pdf 52 mb) | Part II (pdf 42 mb)
2010 Supplemental Draft EIS Comments and Responses (pdf 70 mb)
Final EIS Correspondence (pdf 58.8 mb)
FHWA and WSDOT Response to Additional Review of the Impacts of Deep Bored Tunnel Tolling Diversion on City Streets; Identification of Mitigation (pdf 3.7 mb)
Screening Documents (pdf 10.5 mb)
Tolling Re-evaluation Memo (pdf 3.6 mb)

Alaskan Way Viaduct Replacement Project | (October 2010)

Supplemental Draft Environmental Impact Statement and Draft Section 4(f)

The comment period for the 2010 SDEIS was held from Oct. 29 to Dec 13, 2010

Abstract and Table of Contents (pdf 1 Mb)
Chapter 1 - Introduction (pdf 1.7 Mb)
Chapter 2 - Summary (pdf 10.8 Mb)
Chapter 3 - Alternatives Development (pdf 3.5 Mb)
Chapter 4 - The Project Area (pdf 7 Mb)
Chapter 5 - Bored Tunnel Alternative (pdf 10.4 Mb)
Chapter 6 - Construction (pdf 1.7 Mb)
Chapter 7 - Cumulative Effects (pdf 4.9 Mb)
Chapter 8 - Comparison of Alternatives (pdf 7.7 Mb)
Chapter 9 - Tolling (pdf 9.3 Mb)
Draft Section 4(f) Evaluation (pdf 1.2 kb)
Reference Pages (pdf 528 kb)
Comment Form (pdf 28 kb)

Appendices:

Public Involvement Discipline Report (pdf 1 mb)
Alternatives Description and Construction Methods Discipline Report (pdf 6.5 mb)
Transportation Discipline Report (pdf 16 mb)
Visual Quality Discipline Report (pdf 5.6 mb)
Visual Simulations (pdf 5.6 mb)
Noise Discipline Report (pdf 2.2 mb)
Land Use Discipline Report (pdf 4.7 mb)
Social Discipline Report (pdf 4.2 mb)
Section 106: History, Cultural and Archaeological Resources Discipline Report (pdf 30.2 mb)
Section 4(f) Supplemental Materials (pdf 2.3 mb)
Public Services and Utilities Discipline Report (pdf 1 mb)
Economics Discipline Report (pdf 1.9 mb)
Air Discipline Report (pdf 2.3 mb)
Wildlife, Fish and Vegetation Discipline Report (pdf 938 kb)
Surface Water Discipline Report (pdf 5.8 mb)
Earth Discipline Report (pdf 4.3 mb)
Hazardous Materials Discipline Report (pdf 10 mb)
Energy Discipline Report (pdf 1.5 mb)
Project History Report (pdf 5.4 mb)
Supplemental Draft EIS Annotated Outline (pdf 481 kb)

South Holgate Street to South King Street Viaduct Replacement Project

Finding of No Significant Impact and Final Section 4(f) Evaluation (February 2009)

Cover, Table of Contents, Acronyms (pdf 430 kb)
Chapter 1 - Updated Project Description (pdf 5.7 Mb)
Chapter 2 - Coordination and Comments (pdf 29 kb)
Chapter 3 - Determination and Findings (pdf 45 kb)
Section 4(f) Evaluation (pdf 290 kb)
Attachment 1 - Errata to the EA and Discipline Reports (pdf 10.8 Mb)
Attachment 2 - Notice of Availability of FONSI and SEPA Determination of Nonsignificance (pdf 82 kb)
Attachment 3 - FONSI Distribution List (pdf 24 kb)
Attachment 4 - Mitigation Commitment List (pdf 188 kb)
Attachment 5 - Comments and Responses (pdf 7.6 Mb)
Attachment 6 - Memorandum of Agreement (pdf 585 kb)

Battery Street Tunnel Fire and Safety Improvements Project (October 2008)

SEPA Determination of Nonsignificance (pdf 92 kb)
Environmental Checklist (pdf 1.3 Mb)
Air Quality Discipline Report (pdf 911 kb)
Transportation Discipline Report (pdf 3 Mb)

South Holgate Street to South King Street Viaduct Replacement Project (June 2008)

Cover and Executive Summary (pdf 0.86 Mb)
Chapter 1 - Purpose and Need (pdf 571 kb)
Chapter 2 - Alternative Development (pdf 764 kb)
Chapter 3 - Permanent Effects and Mitigation (pdf 2.1Mb)
Chapter 4 - Construction Effects and Mitigation (pdf 3.5Mb)
Draft Section 4(f) and Reference (pdf 277 kb)
Complete (Cover through Reference, no appendices) (pdf 7.7 Mb)

Appendices:

Glossary (pdf 51 kb)
Potential Mitigation Measures (pdf 118 kb)
Agency - Tribal Correspondence (pdf 3.4 mb)
Draft Section 4(f), Parts A, B and C (pdf 2 mb)
Air Quality Discipline Report (pdf 1.4 mb)
Transportation Discipline Report (pdf 5 mb)
Technical Memoranda (20 separate files)
- Alternative Description and Construction Technical Memorandum (pdf 3.1 mb)
- Archaeological Resources Section 106 Technical Memorandum Part I (pdf 9.2 mb) | Part II (pdf 9.8 mb) | Part III (pdf 4.5 mb)
- Economics Technical Memorandum (pdf 1.1 mb)
- Environmental Justice Technical Memorandum (pdf 1.4 mb)
- Geology and Soils Technical Memorandum (pdf 1.5 mb)
- Hazardous Materials Technical Memorandum (pdf 7.2 mb)
- Historic Resources Section 106 Technical Memorandum (pdf 692 kb)
- Land Use and Shorelines Technical Memorandum (pdf 840 kb)
- Noise and Vibration Technical Memorandum (pdf 1.3 mb)
- Parks and Recreation Technical Memorandum (pdf 1 mb)
- Public Involvement Technical Memorandum (pdf 338 kb)
- Public Services and Utilities Technical Memorandum (pdf 486 kb)
- Relocations Technical Memorandum (pdf 377 kb)
- Social Resources Technical Memorandum (pdf 1.5 mb)
- Visual Quality Technical Memorandum (pdf 1.9 mb)
- Water Resources Technical Memorandum (pdf 9.2 mb)
Draft Memorandum of Agreement (pdf 248 kb)

South Massachusetts Street to Railroad Way South Electrical Line Relocation (February 2008)

SEPA Determination of Nonsignificance (pdf 69 kb)
Environmental Checklist (pdf 1 Mb)
Addendum to SEPA Environmental Checklist April 2008 (pdf 59 kb)
Notice of Action April 2008 (pdf 72 kb)
Vicinity Map, Duct Bank Alignment and Transmission Contingency Alignment (pdf 324 kb)

Alaskan Way Viaduct and Seawall Replacement

Supplemental Draft Environmental Impact Statement (July 2006)

Abstract and Table of Contents (pdf 1.4 kb)
Chapter 1 - Introduction (pdf 1.6 mb)
Chapter 2 - Project Update (pdf 1.1 mb)
Chapter 3 - Summary (pdf 8.6 mb)
Chapter 4 - The Alternatives (pdf 2.2 mb)
Chapter 5 - Project Effects (pdf 8.2 mb)
Chapter 6 - Construction (pdf 2.5 mb)
Chapter 7 - Construction Effects (pdf 3.3 mb)
Chapter 8 - Other Things To Consider (pdf 650 kb)
Reference Pages (pdf 2.3 mb)
Comment Form (pdf 80 kb)

Appendices:

Agency and Public Coordination (pdf 397 kb)
Alternatives Description and Construction Methods Technical Memorandum (pdf 9 mb)
Transportation Discipline Report (pdf 3.6 mb)
Visual Quality Technical Memorandum (pdf 553 kb)
Visual Simulations (pdf 2.9 mb)
Noise and Vibration Discipline Report (pdf 582 kb)
Land Use and Shorelines Technical Memorandum (pdf 530 kb)
Parks and Recreation Technical Memorandum (pdf 968 kb)
Social Resources Technical Memorandum (pdf 1.5 mb)
Environmental Justice Technical Memorandum (pdf 468 kb)
Relocations Technical Memorandum (pdf 2.7 mb)
Historic Resources Technical Memorandum (pdf 2.3 mb)
Archaeological Resources and Traditional Cultural Places Technical Memorandum (pdf 815 kb)
Section 4(f) Evaluation Parts A, B, C and D (pdf 6.2 mb)
Public Services and Utilities Technical Memorandum (pdf 1.1 mb)
Economic Technical Memorandum (pdf 802 kb)
Air Quality Discipline Report (pdf 696 kb)
Fisheries, Wildlife, and Habitat Discipline Report (pdf 1.5 mb)
Water Resources Discipline Report (pdf 893 kb)
Geology and Soils Technical Memorandum (pdf 420 kb)
Hazardous Materials Discipline Report (pdf 4.1 mb)
Energy Technical Memorandum (pdf 314 kb)
Alternatives and Options Drawings (pdf 7 mb)
Supplemental Draft EIS Annotated Outline (pdf 414 kb)

Draft Environmental Impact Statement (March 2004)

Cover and Table of Contents (pdf 661 kb)
Chapter 1 - Introduction (pdf 227 kb)
Chapter 2 - Summary and Comparison of Alternatives (pdf 4.3 mb)
Chapter 3 - Project Area Then and Now (pdf 3.9 mb)
Chapter 4 - Developing Alternatives (pdf 1.3 mb)
Chapter 5 - Rebuild Alternative (pdf 1.4 mb)
Chapter 6 - Aerial Alternative (pdf 1.5 mb)
Chapter 7 - Tunnel Alternative (pdf 1.4 mb)
Chapter 8 - Bypass Tunnel Alternative (pdf 1.5 mb)
Chapter 9 - Surface Alternative (pdf 1.4 mb)
Chapter 10 - Construction Impacts and Mitigation (pdf 3.3 mb)
Chapter 11 - Other Things to Consider (pdf 284 kb)
Acronyms (pdf 39 kb)
Index (pdf 483 kb)
References and List of Preparers (pdf 2.9 mb)
Appendices and Distribution List (pdf 43 kb)
Purpose and Need Statement (pdf 39 kb)

Appendices:

Agency and Public Coordination (pdf 8.3 mb)
Alternatives and Construction Methods (pdf 2.8 mb)
Transportation Discipline Report (pdf 8.3 mb)
Visual Quality Technical Memorandum (pdf 2.4 mb)
Visual Simulations (in three files)
Part I (pdf 6.6 mb) | Part II (pdf 6.9 mb) | Part III (pdf 5.4 mb)
Noise and Vibration Discipline Report (pdf 2.4 mb)
Land Use and Shorelines Technical Memorandum (pdf 1.7 mb)
Parks and Recreation Technical Memorandum (pdf 2.1 mb)
Social Resources Technical Memorandum (pdf 2.4 mb)
Environmental Justice Technical Memorandum (pdf 693 kb)
Relocations Technical Memorandum (pdf 388 kb)
Historic Resources Technical Memorandum (pdf 1.6 mb)
Archaeological Resources (pdf 3.4 mb)
Section 4(f) Evaluation (pdf 1.9 mb)
Public Services and Utilities Technical Memorandum (pdf 877 kb)
Economic Technical Memorandum (pdf 1.6 mb)
Air Quality Discipline Report (pdf 2.3 mb)
Fisheries, Wildlife, and Habitat Discipline Report (pdf 65. mb)
Water Resources (in two files)
Part I (pdf 4.7 mb) | Part II (pdf 5.9 mb)
Geology and Soils Technical Memorandum (pdf 2.7 mb)
Hazardous Materials Discipline Report (pdf 6.2 mb)
Energy Technical Memorandum (pdf 285 kb)
Alternatives and Options Drawings (in two files)
Part I (pdf 4.7 mb) | Part II (pdf 6.1 mb)
Design Variations (in two files)
Part I (pdf 8.8 mb) | Part II (pdf 6.9 mb)
Annotated Outline (pdf 300 kb)