Brightwater treatment system

• Final EIS errata, November 26, 2003 (346KB)
• Cover letter, November 19, 2003 (126KB)
• Foreword (47KB)
• Fact sheet (89KB)
• Acronyms (37KB)
• Table of contents, includes list of tables and list of figures (263KB)
• Map of system alternatives (632KB)
• Chapter 1. Summary (1.5MB)
• Chapter 2. Background (2.3MB)
• Chapter 3. Description and comparison of alternatives (8.7MB)
• Chapter 4. Earth (3.1MB)
• Chapter 5. Air (1.7MB)
• Chapter 6. Water resources (3.7MB)
• Chapter 7. Plants, animals, and wetlands (8.6MB)
• Chapter 8. Energy and natural resources (1.1MB)
• Chapter 9. Environmental health (1.2MB)
• Chapter 10. Noise and vibration (1.8MB)
• Chapter 11. Land and shoreline use (2.3MB)
• Chapter 12. Aesthetics (5.8MB)
• Chapter 13. Light and glare (1.6MB)
• Chapter 14. Recreation (1.6MB)
• Chapter 15. Cultural resources (1.6MB)
• Chapter 16. Transportation (4.8MB)
• Chapter 17. Public services and utilities (2.5MB)
• Glossary (124KB)
• Distribution list (35KB)
• Summary of Brightwater Summer 2003 technical seminars (2.1MB)

Appendices for chapter 2, background

• 2-A. Population and flow analysis (5.4MB)
• 2-B. Portal screening level 1 and 2 documentation (37MB)
• 2-C. Portal 19 screening level 3 documentation (2.5MB)
• 2-D. Peer review of scientific investigations conducted for phases I, II, and III of the marine outfall siting study (1.5MB)

Appendices for chapter 3, description and comparison of alternatives

• 3-A. Project description: treatment plant (11MB)
• 3-B. Project description: conveyance (51MB)
• 3-C. Project description: outfall (26MB)
• 3-D. Reclaimed water technology review and evaluation of potential water reuse opportunities (25MB)
• 3-E. Flow management and safety relief point (3.5MB)
• 3-F. Nearshore alignment and construction methods alternatives (52MB)
• 3-G. Construction approach and schedule (1.4MB)
• 3-H. Diffuser predesign (19MB)
• 3-I. Proposed routine monitoring plan for the receiving environment in the vicinity of the Brightwater treatment system marine outfall (0.6MB)
• 3-J. Evaluation of the no action alternative (17MB)
• 3-K. Treatment plant disinfection alternatives (2.4MB)
• 3-L. Preliminary working draft facilities plan (25MB)

Appendices for chapter 4, Earth

• 4-A. Geotechnical data report for proposed route 9 treatment plant site (17MB)
• 4-B. Geotechnical progress report: conveyance (3MB)
• 4-C. Outfall geophysical surveys (5.3MB)
• 4-D. Phase I environmental site assessment-route 9 parcels (15MB)

Appendices for chapter 5, air

• 5-A. Odor and air quality: treatment plant (1.6MB)
• 5-B. Odor analysis: conveyance (0.7MB)
• 5-C. Construction-related air quality impacts: conveyance (1.8MB)

Appendices for chapter 6, water resources

• 6-A. Affected environment: surface water (2.6MB)
• 6-B. Geology and groundwater (20.9MB)
• 6-C. Management of water quality during construction at the treatment plant sites (0.5MB)
• 6-D. Permanent stormwater management at the treatment plant sites (7.9MB)
• 6-E. Route 9 site runoff effects on the geomorphology of Little Bear Creek (23MB)
• 6-F. Groundwater and stormwater management at the candidate portal sites (0.6MB)
• 6-G. Assessment of buoyant materials and the microlayer (5.8MB)
• 6-H. Predesign initial dilution assessment (2.8MB)
• 6-I. Effluent quality evaluation for the membrane bioreactor and advanced primary system (2MB)
• 6-J. Summer season temperature effects of stormwater ponds on receiving streams (0.5MB)

Appendices for chapter 7, plants, animals, and wetlands

• 7-A. Affected environment: plants and animals (1MB)
• 7-B. Route 9 site sensitive areas technical report (13MB)
• 7-C. Unocal site sensitive areas technical report (16MB)
• 7-D. Assessment of potential influence of Brightwater discharges on harmful algal blooms in Puget Sound (1MB)
• 7-E. Eelgrass monitoring survey plan for the Brightwater marine outfall alternatives (1.5MB)
• 7-F. Eelgrass Survey Results for the Brightwater Marine Outfall Alternatives (15.8MB)

Appendices for chapter 10, noise and vibration

• 10-A. Noise and vibration: treatment plant (4.3MB)
• 10-B. Noise and vibration: conveyance (2.6MB)

Appendices for chapter 11, land and shoreline use

• 11-A. Land use plans and policies: Brightwater regional wastewater treatment system (1MB)

Appendices for chapter 13, light and glare

• 13-A. Illumination modeling of Route 9 and unocal treatment plants (25MB)
• 13-B. Light and glare: conveyance (2.5MB)

Appendices for chapter 15, cultural resources

• 15-A. Cultural resources: historic buildings and structures (19MB)

Appendices for chapter 16, transportation

• 16-A. Transportation concurrency: Route 9 plant site (10MB)
• 16-B. Transportation impacts: plant sites and conveyance (3.6MB)

• Volume 11. Federal agencies, state agencies, Native American tribes, Snohomish County (40.6MB)
• Volume 12. Cities and towns, sewer and water districts, other governmental entities (71.4MB)
• Volume 13. Groups, organizations, and businesses (82.9MB)
• Volume 14. Individuals: A-H (55.4MB)
• Volume 15. Individuals: I-Z (67.8MB)

• Summary of the Brightwater Summer 2003 technical seminars, including comments received (22.5MB)

Addendum no. 5 and final supplemental EIS addendum no. 2, issued January 3, 2007 (60 KB)

This addendum reports on the results of seismic trenching on the Brightwater Treatment Plant site in the summer of 2006 and the approach to seismic design on the site. The report and memo referenced in the addendum are available here.

Addendum no. 4, issued September 1, 2004 (317 KB)

Provides additional information on and/or evaluation of the impacts of constructing and operating:

• The influent pump station at portal 41;
• facilities along the conveyance corridor; and
• the safety relief point at a location 200 ft west of the location identified in the final EIS.

Addendum no. 3, issued April 30, 2004 (3.9 MB)

Provides the following:

• an updated evaluation of aeromagnetic and LiDAR imagery for the postulated onshore extension of the South Whidbey Island fault
• a review of boring data and a seismic refraction survey at the Route 9 site
• an analysis of ground motion studies at the Route 9 site
• a description of geotechnical data that will be used for design of the conveyance system and outfall
• additional discussion of the final EIS worst-case analysis of impacts and mitigation measures associated with major seismic events

Addendum no. 2, issued April 2, 2004. (3.7 MB KB)

Provides the following:

• Identifies selected portal sites
• Provides information and analysis of the impacts of using trucks, barge, or rail for transporting excavated materials away from the portal 19 site at the Chevron-Texaco Richmond Beach asphalt terminal.
• Describes and analyzes the impacts of a proposed temporary construction access road at the southern end of the Route 9 site and installation of a traffic signal at the SR-9/SR-522 Westbound ramp intersection to reduce construction-related traffic along SR-9 north of SR-522
• Provides more information and analysis of impacts of demolition and construction on the Route 9 site, particularly in relation to the StockPot Culinary campus

Addendum 1, issued January 27, 2004. (288 KB)

Provides the following:

• an updated analysis of traffic impacts and mitigation measures using alternative assumptions related to background traffic growth rates for the eastern portion of the project area
• additional information about potential improvements to and use of the existing barge dock at the Chevron Richmond Beach asphalt terminal for transporting materials and spoils during construction of the conveyance pipeline and the marine outfall at Point Wells

King County prepared this final supplemental Environmental Impact Statement (final Supplemental EIS) on the Brightwater regional wastewater treatment system. The final supplemental EIS is a supplement to the final EIS issued in November 2003.

A 16-page summary (2 MG) of the final supplemental EIS is also available.

The final supplemental EIS includes:

• comments made on the draft supplemental EIS and responses to comments
• changes made to pages in the draft supplemental EIS, organized by chapter and appendix
• updated cover letter, foreword, fact sheet, acronyms and abbreviations, glossary, and distribution list; and errata sheet
• the two-volume draft supplemental EIS, issued April 11, 2005

Final supplemental EIS

Cover letter (32KB)

Foreword (17KB)

Fact sheet (67KB)

Acronyms and abbreviations (19KB)

Table of contents (20KB)

Summary responses to comments (220KB)

Individual responses to comments (22.4MG)
    Government agencies, organizations, individuals

Changes in the supplemental EIS text made in response to comments (5.6MG)
       Foreword
       Chapter 1
       Chapter 2
       Chapter 3
       Chapter 4
       Chapter 5
       Appendix G (added)

Glossary (84KB)

Distribution List (28KB)

Errata (28KB)

The May 4, 2005, public hearing transcript (56KB)

Draft supplemental EIS, issued April 11, 2005

Cover letter (26KB)

Foreword (44KB)

Fact sheet (60KB)

Acronyms (15KB)

Table of contents, list of tables and figures (37KB)

Chapter 1 – Introduction (1.74MB)

Chapter 2 – Seismic background and context (1.3MB)

Chapter 4 – Worst-case earthquake scenarios assumed in the impacts analysis (1.41MB)

Chapter 5 – Environmental impacts if a major earthquake were to damage Brightwater facilities and mitigation of impacts (1.0MB)

Scenario tables (79KB)

Glossary (84KB)

Distribution list (31KB)

Draft supplemental EIS appendices (note large file sizes)

Appendix A – Surface-fault-rupture hazard evaluation (14.2MB)

Appendix B – Revised probabilistic seismic hazard analyses (3.8MB)

Appendix C – Building code regulations and seismic studies used in the structural design of the Brightwater facilities (108KB)

Appendix D – Emergency overflow surface water impacts analysis (343KB)

Appendix E – Analysis of flooding and water quality effects in Little Bear Creek following a major earthquake (2.1MB)

Appendix F – Brightwater SEPA supplement groundwater evaluation (5.8MB)

Note: though not issued as part of the draft supplemental EIS, an appendix G has been added – see above under: "Changes in the supplemental EIS text made in response to comments"

Treatment plant – approach to seismic design. CH2M Hill, Brown and Caldwell, Mithun. Oct. 9, 2006 (235 KB)

Note: this memo has been updated and the updated version, above, was posted on this web site on Jan. 8, 2007. Changes have been made on the following pages:

• Pg 1: New engineering stamps and signatures have been provided
• Pg 5: "Snohomish PUD substation" has been added to seismic use group III in table 1
• Pg 6: The first sentence regarding the peak level of ground shaking has been revised.

In addition, a footer has been added to the updated document. Otherwise, the remainder of the document is unchanged.

This report and memo are referenced in Brightwater final EIS addendum no. 5 and final supplemental EIS addendum no. 2, issued January 3, 2007

Chemical building seismic trenches, Brightwater Wastewater Treatment Plant site, Oct. 19, 2006, pages 1-27 (225 KB)

Report figures, pages 28-59 (5.5 MB)

Appendix A - Trenching investigations of the proposed buildings (3.4 MB)

Appendix B - Radiocarbon dating results (75 KB)

Appendix C - Liquefaction article (4.5 MB)

Appendix D - Comments relevant to USGS site visit report, July 6, 2006 (102 KB)

Appendix E - Comments relevant to Dr. Yeats’ e-mail letter, transmitted July 12, 2006 (38 KB)

Appendix F - Responses to report of August 21, 2006 by Earth Consultants International (411 KB)