Contract summary
This project will replace the existing Portage Bay Bridge 520/3, with two new parallel variable depth segmental box girder bridges across Portage Bay, the existing SR 520 eastbound off-ramp structure to Montlake Boulevard East, the existing 10th Ave E and Delmar E under-crossings with a new Roanoke Lid Bridge, and provide approximately 75 retaining walls. This project will also extend the SR 520’s transit/HOV system from Montlake to I-5 and the cross-lake bicycle and pedestrian trail over Portage Bay to a new lid between Delmar Drive East and 10th Avenue East.
Other major work includes providing stormwater conveyance, stormwater treatment, maintaining existing WPA drainage system, utility relocation, protect sewer outflow, relocate existing lumen duct bank, replace trolly poles, landscaping, paving, mechanical ventilation fire life safety system, and reversible ramp gate system.
Award information
- Award status: awarded 3/11/2024
- Award amount: $1,374,800,000.00
- Awarded to: Skanska USA Civil West California District Inc.
1995 Agua Mansa Rd
Riverside, CA 92509-2405
Redacted statement of qualifications and proposal
Redacted statement of qualifications and proposal (FTP Directory) - posted 4/1/2024
Conformed request for proposal
- Instructions to proposers (PDF 639KB) - posted 3/21/2024
- Chapter 1 (PDF 2MB) - posted 3/21/2024
- Chapter 2 (PDF 5.6MB) - posted 3/21/2024
- Appendices (FTP Directory) - updated 5/6/2024
Price proposal opening results
- Apparent best value determination (PDF 65KB) - posted 9/13/2023
- Bid tabulation (PDF 132KB) - updated 3/11/2024
Request for proposal Addenda
- Addendum 1 (FTP Directory) - posted 2/24/2023
- Addendum 2 (FTP Directory) - posted 3/14/2023
- Addendum 3 (FTP Directory) - posted 3/29/2023
- Addendum 4 (FTP Directory) - posted 4/6/2023
- Addendum 5 (FTP Directory) - posted 4/21/2023
- Addendum 6 (FTP Directory) - posted 5/2/2023
- Addendum 7 (FTP Directory) - posted 5/16/2023
- Addendum 8 (FTP Directory) - posted 5/26/2023
- Addendum 9 (FTP Directory) - posted 6/15/2023
- Addendum 10 (FTP Directory) - posted 6/29/2023
- Addendum 11 (FTP Directory) - posted 7/26/2023
- Addendum 12 (FTP Directory) - posted 8/4/2023
- Addendum 13 (FTP Directory) - posted 8/17/2023
Request for proposal Q&A
- Q&A #1 (PDF 544KB) - posted 2/23/2023
- Q&A #2 (PDF 571KB) - posted 3/8/2023
- Q&A #3 (PDF 486KB) - posted 3/30/2023
- Q&A #4 (PDF 513KB) - posted 4/12/2023
- Q&A #5 (PDF 564KB) - posted 4/21/2023
- Q&A #6 (PDF 513KB) - posted 5/17/2023
- Q&A #7 (PDF 483KB) - posted 6/26/2023
- Q&A #8 (PDF 487KB) - posted 7/26/2023
- Q&A #9 (PDF 4,267KB) - posted 8/3/2023
- Q&A #10 (PDF 199KB) - posted 8/10/2023
Voluntary proposer meeting material
- Voluntary proposer meeting presentation (10.764 MB) - posted 2/14/2023
- Voluntary proposer meeting registration list (452 KB) - posted 2/14/2023
- DEI contact sheet (244 KB) - posted 2/14/2023
Request for proposal
- Instructions to proposers (PDF 639KB) - posted 1/23/2023
- Chapter 1 (PDF 2MB) - posted 1/23/2023
- Chapter 2 (PDF 5.6MB) - posted 1/23/2023
- Contract form (PDF 288KB) - posted 1/23/2023
- Fillable forms (FTP Directory) - posted 1/23/2023
- Appendices (FTP Directory) - posted 1/23/2023
Short listed submitters
Short list letter (PDF 251KB) - posted 1/19/2023
Submitters
Submitters list with single point of contact (PDF 86KB) - posted 1/3/2023
Request for qualifications Q&A
- Q&A #1 (PDF 465KB) - posted 11/28/2022
- Q&A #2 (PDF 470KB) - posted 12/13/2022
Request for qualifications addenda
- Addendum #1 (PDF 786KB) - posted 11/22/2022
- Addendum #2 (PDF 626KB) - posted 12/13/2022
Request for qualifications
- Request for qualifications (PDF 1.1MB) - posted 11/14/2022
- Form A (PDF 180KB) - posted 11/14/2022
- Form B1 (PDF 215KB) - posted 11/14/2022
- Form B2 (PDF 218KB) - posted 11/14/2022
- Form C (PDF 236KB) - posted 11/14/2022
- Form D (PDF 1.4MB) - posted 11/14/2022
- Form E (PDF 180KB) - posted 11/14/2022
Voluntary submitters meeting
- Voluntary submitters meeting diversity and inclusion contact sheet (PDF 222KB) - posted 11/28/2022
- Voluntary submitters meeting presentation (PDF 1.9MB) - posted 11/22/2022
- Voluntary submitters meeting registration list (PDF 428KB) - posted 11/22/2022
- Submitters meeting announcement (725 KB) - posted 10/27/2022
- Voluntary submitters meeting registration - posted 10/27/2022
Project information available
- Project datum conversion (PDF 34KB) - posted 3/27/2023
- Proposer one-on-one meetings (PDF 1.459MB) - posted 3/24/2023
- Advertisement notice (PDF 143KB) - posted 10/24/2022
- Public disclosure request (FTP directory) - posted 9/6/2022
- SDC and WSDOT Collaboration Letter - Portage Bay Phase (PDF 12.9MB)
- SR 520 Rest of the West - Seattle Design Commission page
- Drawing of conceptual design (PDF 1.5MB) - posted 9/1/2022
- One-pager (PDF 11.2MB) - updated 10/20/2022
- Drone photos (FTP Directory) - posted 3/8/2023