Supplemental Draft Environmental Impact Statement

The Supplemental Draft Environmental Impact Statement public comment period ended June 13, 2022. The following materials available during the public comment period are linked below and contain information and related documents pertaining to the Supplemental Draft EIS.

Supplemental Draft Environmental Impact Statement

Table of Contents (148.58 KB)
Cover Sheet (508.07 KB)
Executive Summary (11.25 MB)
Chapter 1 – Purpose and Need of the Project (1.22 MB)
Chapter 2 – Project Alternatives (2.72 MB)
Chapter 3 – Affected Environment and Environmental Consequences (12.79 MB)

Attachments

Acronyms and Abbreviations (90.25 KB)
References (130.44 KB)
List of Preparers (181.78 KB)
List of Supporting Technical Documentation (72.82 KB)
List of Distribution and Notice of Availability (140.47 KB)
Agency Letters (9.9 MB)
Summary of Permits and Clearances Needed (88.25 KB)
Summary of Potential Mitigation (350.28 KB)
Summary of Public Involvement and Agency Coordination (501.71 KB)
Index (147.58 KB)
Section 4(f) (Parks, Recreation, and Open Space Resources Historic Sites) (93.36 MB)
Cost Risk Assessment Summaries (479.89 KB)

Technical Reports

Technical report topics are shown below. You can access the level of detail that is right for you by following the links to the full supplemental memorandum or revised technical report, or by referencing the chapter and page number in the Supplemental Draft EIS.

Topic	Supplemental Memo or Revised Technical Report	Location in Supplemental DEIS
Acquisitions and Displacements	Acquisitions and Displacements Supplemental Memo (6.75 MB)	EIS Ch.3, p. 17
Air Quality	Air Quality Supplemental Memo (948.47 KB)	EIS Ch.3, p. 120
Climate Change	Climate Change Supplemental Memo (1.37 MB)	EIS Ch.3, p. 126
Cultural Resources	Cultural Resources Supplemental Memo (87.31 MB)	EIS Ch.3, p. 67
Economic Impacts	Economic Impacts Supplemental Memo (1.11 MB)	EIS Ch.3, p. 34
Environmental Justice	Environmental Justice Supplemental Memo (2.93 MB)	EIS Ch.3, p. 52
Hazardous Materials	Hazardous Materials Supplemental Memo (2.31 MB)	EIS Ch.3, p. 122
Hydraulic Impact Analysis	Hydraulic Impact Analysis Supplemental Memo (13.3 MB)	EIS Ch.3, p. 90
Land Use	Land Use Supplemental Memo (3.73 MB)	EIS Ch.3, p. 32
Noise and Vibration	Noise and Vibration Supplemental Memo (1.94 MB)	EIS Ch.3, p. 118
Parks and Recreation	Parks and Recreation Supplemental Memo (2.42 MB)	EIS Ch.3, p. 62
Public Services	Public Services Supplemental Memo (1.37 MB)	EIS Ch.3, p. 38
Right-of-Way	Right-of-Way Supplemental Memo (2.44 MB)	EIS Ch.3, p. 17
Social/Neighborhood	Social Neighborhood Supplemental Memo (2 MB)	EIS Ch.3, p. 49
Soils and Geology	Soils and Geology Supplemental Memo (890.75 KB)	EIS Ch.3, p. 83
Stormwater	Stormwater Supplemental Memo (913.11 KB)	EIS Ch.3, p. 87
Transportation	Transportation Supplemental Memo (8 MB)	EIS Ch.3, p. 1
Utilities	Utilities Revised Technical Report (5.9 MB)	EIS Ch.3, p. 44
Vegetation, Wildlife, and Aquatic Species	Vegetation Wildlife and Aquatic Species Supplemental Memo (3.83 MB)	EIS Ch.3, p. 95
Visual Resources	Visual Resources Revised Technical Report (19.07 MB)	EIS Ch.3, p. 78
Wetlands and Waters	Wetlands and Waters Supplemental Memo (2.64 MB)	EIS Ch.3, p. 108

Additional Reports and Memos

The February 2021 Draft EIS and its supporting documents are available for download on the project website.

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Supplemental Draft Environmental Impact Statement