SR 520 Bridge Replacement and HOV Program - Pontoon environmental documents

WSDOT has completed environmental analysis for the SR 520 Pontoon Construction Project. Construction began in 2011 to build a new casting basin facility and 33 concrete pontoons in Aberdeen, WA. 

Jan. 11, 2011 - Record of Decision (pdf 4.0 mb)

Dec. 2, 2010 - Final Environmental Impact Statement

Executive Summary (pdf 3.5 mb) 

Table of Contents (pdf 1.2 mb)

Chapter 1 - Introduction to the Project (pdf 732 kb) 

Chapter 2 - Project Alternatives (pdf 3.6 mb)

Chapter 3 - Environmental Effects 

Chapter 4 - Comparison of the Alternatives (pdf 155 kb)

Chapter 5 - Mitigation (pdf 658 kb)

Chapter 6 - Other Considerations and Next Steps (pdf 204kb)

Chapter 7 - Public and Agency Comments on the Draft EIS (pdf 111 kb)

Attachments

  1. Preparers (pdf 53 kb)
  2. Distribution List (pdf 21 kb)
  3. References (pdf 194 kb)
  4. Glossary (pdf 109 kb)
  5. Acronyms (pdf 30 kb)
  6. Index (pdf 94 kb)
  7. Appendices (pdf 39 kb)

Updated Appendices

B - Description of Alternatives and Construction Techniques Discipline Report (pdf 8.6 mb)

T - Draft Environmental Impact Statement Comments and Responses Report (pdf 10.2 mb)

U - Summary of Effects Technical Memorandum (pdf 343 kb)

 

July 2010 - SR 520 Pontoon Construction Project Draft Environmental Impact Statement Summary of Comments (pdf 3.45 mb)

May 28, 2010 - Draft Environmental Impact Statement

Executive Summary (pdf 2.7 mb)

Table of Contents (pdf 1.2 mb)

Chapter 1 - Introduction to the Project (pdf 710kb)

Chapter 2 - Project Alternatives (pdf 4.4 mb)

Chapter 3 - Environmental Effects

Chapter 4 - Comparison of the Alternatives (pdf 152 kb)

Chapter 5 - Preferred Alternative and Next Steps (pdf 156 kb)

Attachments (pdf 626 kb)

Appendices

  1. Agency Coordination and Public Involvement Discipline Report (pdf 3.7 mb)
  2. Description of Alternatives and Construction Techniques Discipline Report (pdf 4.2 mb)
  3. Ecosystems Discipline Report
    Part 1 (pdf 4.1 mb)
    Part 2
    - Part 1 (pdf 3.03 mb)
    - Part 2 (pdf 1.4 mb)
  4. Geology and Soils Technical Memorandum
    - Part 1 (pdf 1.0 mb)
    - Part 2 (pdf 5.9 mb)
    - Part 3 (pdf 171 kb)
  5. Hazardous Materials Technical Memorandum
    - Part 1 (pdf 4.4 mb)
    - Part 2 (pdf 6.0 mb)
    - Part 3 (pdf 7.2 mb)
    - Part 4 (pdf 3.1 mb)
    - Part 5 (pdf 2.4 mb)
    - Part 6 (pdf 3.3 mb)
  6. Water Resources Discipline Report
    - Part 1 (pdf 1.1 mb)
    - Part 2 (pdf 5.0 mb)
    - Part 3 (pdf 1.2 mb)
  7. Air Quality Technical Memorandum (pdf 3.8 mb)
  8. Energy Technical Memorandum (pdf 1.2 mb)
  9. Cultural Resources Discipline Report and Technical Reports
    Volume 1
    - Part 1 (pdf 14.4 mb)
    - Part 2 (pdf 16.7 mb)
    - Part 3 (pdf 8.6 mb)
    - Part 4 (pdf 13.3 mb)
    - Part 5 (pdf 4.3 mb)
    - Part 6 (pdf 5.5 mb)
    - Part 7 (pdf 1.9 mb)
    - Part 8 (pdf 11.7 mb)
    - Part 9 (pdf 5.3 mb)
    - Part 10 (pdf 7.7 mb)
    - Part 11 (pdf 7.4 mb)
    - Part 12 (pdf 7.7 mb)
    - Part 13 (pdf 3.3 mb)
    - Part 14 (pdf 15.4 mb)
    - Part 15 (pdf 34.2 mb)
    Volume 2 (pdf 6.5 mb)
    Volume 3 (pdf 5.5 mb)
  10. Economics Technical Memorandum (pdf 1.1 mb)
  11. Navigable Waterways Technical Memorandum (pdf 4.1 mb)
  12. Noise Technical Memorandum
    - Part 1 (pdf 1.0 mb)
    - Part 2 (pdf 1.6 mb)
    - Part 3 (pdf 2.0 mb)
    - Part 4 (pdf 53 kb)
  13. Public Services and Utilities Discipline Report (pdf 2.0 mb)
  14. Land Use Technical Memorandum (pdf 2.4 mb)
  15. Social Elements Discipline Report (pdf 4.6 mb)
  16. Transportation Technical Memorandum
    - Part 1 (pdf 4.9 mb)
    - Part 2 (pdf 4.4 mb)
    - Part 3 (pdf 6.5 mb)
  17. Visual Quality and Aesthetics Technical Memorandum (pdf 4.6 mb)
  18. Section 4(f) Resources Technical Memorandum (pdf 758 kb)
  19. Indirect and Cumulative Effects Methods Memorandum (pdf 1.6 mb)

 

Note: Updated PDF files for the Cultural Resources Discipline Report and Technical Reports were added on June 8, 2010. These updated files correct a PDF file error found in the previous online and CD versions.

  List of public libraries where the EIS is available

  • Aberdeen Timberland Library
  • Elma Timberland Library
  • Hoquiam Timberland Library
  • Grays Harbor College Library
  • McCleary Timberland Library
  • Montesano Timberland Library
  • Seattle Public Library Central Branch
  • University of Washington Suzzallo and Allen Libraries
  • Tacoma Main Library
  • Westport Timberland Library

 

April 2009 - Pontoon Construction Project EIS Scoping Comments Report Addendum (pdf 68kb)

March 2009 - Pontoon Construction Project EIS Scoping Comments Report (pdf 62kb)

January 2008 - Pontoon Construction Project Public Scoping Meeting Comment Summary (pdf 79kb)