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I-405 Corridor Program - Bellevue to Lynnwood Improvement Project Environmental Assessment

I-405, Bellevue to Lynnwood Improvement Project Environmental Assessment

On July 25, WSDOT published the Finding of No Significant Impact (FONSI) for the I-405 Belleuve to Lynnwood Improvement Project. You can download the FONSI below.

Finding of No Significant Impact (FONSI)

FONSI - Pg 1-32 (pdf 4.9 mb)
FONSI - Pg 33-120 (pdf 5.4 mb)

On May 10, 2011, WSDOT published an Environmental Assessment (EA) for the Bellevue to Lynnwood Improvement Project. The Environmental Assessment contains the results of our studies on how this project may affect the environment. The comment period for the environmental assessment was May 10 - June 10, 2011.

The State Environmental Protection Act (SEPA) Determination of Non-Significance for the I-405 Bellevue to Lynnwood Improvement Project was also published on May 10, 2011.

Environmental Assessment

Bellevue to Lynnwood EA - Project Description (pdf 4.8 mb)
Bellevue to Lynnwood EA - Project Effects (pdf 3 mb)
Bellevue to Lynnwood EA - Measures to avoid or minimize effects (pdf 1.5 mb)

Discipline Reports, I-405 Bellevue to Lynnwood Improvement Project

Air Quality
Appendix E (pdf 4.6 mb)
Appendix E (pdf 855 kb)

Cultural Resources
Appendix F (pdf 1.5 mb)
Appendix F (pdf 4.5 mb)
Appendix F (pdf 1.4 mb)
Appendix F (pdf 4.6 mb)
Appendix F (pdf 1.4 mb)
Appendix F (pdf 3.9 mb)
Appendix F (pdf 2.2 mb)
Appendix F (pdf 3.0 mb)
Appendix F (pdf 2.4 mb)

Cumulative Effects Analysis
Appendix G  (pdf 5 mb)
Appendix G  (pdf 880 kb)

Economics
Appendix H (pdf 4.7 mb)

Ecosystems
Appendix I (pdf 4.7 mb)
Appendix I (pdf 3.2 mb)
Appendix I (pdf 1.7 mb)
Appendix I (pdf 4.1 mb)
Appendix I (pdf 3.2 mb)
Appendix I (pdf 3.0 mb)

Hazardous Materials 
Appendix J (pdf 2.9 mb)
Appendix J (pdf 1.6 mb)
Appendix J (pdf 1.1 mb)
Appendix J (pdf 4.5 mb)

Land Use, Patterns, Plans & Policies
Appendix K  (pdf 4.7 mb)
Appendix K  (pdf 5.1 mb)

Noise and Vibration
Appendix L (pdf 5.1 mb)
Appendix L (pdf 2.9 mb)

Section 4 (f) Resources
Appendix M (pdf 3.6 mb)
Appendix M (pdf 2.2 mb)

Environmental Justice
Appendix N (pdf 3 mb)

Soils, Geology & Groundwater
Appendix O (pdf 4.7 mb)
Appendix O (pdf 3 mb)
Appendix O (pdf 5 mb)

Traffic and Transportation
Appendix P (pdf 3.7 mb)
Appendix P  (pdf 4.1 mb)

Utilities
Appendix Q (pdf 5 mb)

Visual Quality
Appendix R  (pdf 5 mb)
Appendix R  (pdf 2.1 mb)

Water Resources
Appendix S (pdf 4.7 mb)
Appendix S (pdf 2.7 mb)