Contract summary
WSDOT will build the remaining two miles of new SR 509 Expressway, reconfigure SR 509 interchanges at South 188th and South 160th Streets and add a southbound auxiliary lane on I-5 between SR 516 and South 272nd Street.
- Award Status: awarded 12/4/2023
- Award amount: $478,875,985.00
- Awarded to: Guy F. Atkinson
 707 South Grady Way, Suite 500
 Renton, WA 98057-3224
Redacted statement of qualifications and proposal
Redacted statement of qualifications and proposal (FTP Directory) - posted 1/17/2024
Conformed request for proposal
- Instructions to proposers (PDF 1.1MB) - posted 11/27/2023
- Chapter 1 (PDF 1.9MB) - posted 11/27/2023
- Chapter 2 (PDF 7MB) - posted 11/27/2023
- Appendices (FTP Directory) - posted 11/27/2023
- Contract form (PDF 240KB) - posted 11/27/2023
Price proposal opening results
- Apparent best value determination (PDF 64KB) - posted 11/15/2023
- Bid tabulation (PDF 51KB) - posted 12/4/2023
Request for proposal addenda
- Addendum #1 (FTP Directory) - posted 8/14/2023
- Addendum #2 (FTP Directory) - posted 8/17/2023
- Addendum #3 (FTP Directory) - posted 8/24/2023
- Addendum #4 (FTP Directory) - posted 9/1/2023
- Addendum #5 (FTP Directory) - posted 9/8/2023
- Addendum #6 (FTP Directory) - posted 9/15/2023
- Addendum #7 (FTP Directory) - posted 9/21/2023
- Addendum #8 (FTP Directory) - posted 9/22/2023
- Addendum #9 (FTP Directory) - posted 9/29/2023
Request for proposal Q&A
- Q&A #1 (PDF 200KB) - posted 8/14/2023
- Q&A #2 (PDF 416KB) - posted 8/21/2023
- Q&A #3 (PDF 624KB) - posted 8/24/2023
- Q&A #4 (PDF 988KB) - posted 9/1/2023
- Q&A #5 (PDF 182KB) - posted 9/8/2023
- Q&A #6 (PDF 421 KB) - posted 9/15/2023
Voluntary proposers meeting
- Presentation (PDF 1.6MB) - posted 8/18/2023
- Sign in sheet (PDF 37KB) - posted 8/18/2023
- Flyer (PDF 275KB) - posted 8/10/2023
Request for proposal
- Instructions to proposers (PDF 1.1MB) - posted 7/27/2023
- Chapter 1 (PDF 1.9MB) - posted 7/27/2023
- Chapter 2 (PDF 7MB) - posted 7/27/2023
- Appendices (FTP Directory) - posted 7/27/2023
- Contract form (PDF 240KB) - posted 11/22/2023
- Fillable forms (FTP Directory) - updated 9/18/2023
Short listed submitter
Short list letter (PDF 231KB) - posted 7/21/2023
Procurement Update
- Project procurement update 7/6/2023 (PDF 234KB) - posted 7/7/2023
- Project procurement update 6/1/2023 (PDF 210KB) - posted 6/2/2023
- Project procurement update 5/17/2023 (PDF 49.7KB) - posted 5/18/2023
Request for qualifications addenda
- Addendum #1 (PDF 188KB) - posted 4/7/2023
- Addendum #2 (PDF 158KB) - posted 4/14/2023
- Addendum #3 (PDF 134KB) - posted 4/21/2023
- Addendum #4 (PDF 114KB) - posted 4/28/2023
Q&A
- Q&A 1 (PDF 190KB) - posted 4/21/2023
Voluntary submitters meeting
- Presentation (PDF 155MB) - posted 3/24/2023
- Registration sign in sheet (PDF 82.61KB) - posted 3/24/2023
Request for qualifications
- Request for qualifications (PDF 574KB) - posted 3/1/2023
- Fillable forms (FTP directory) - posted 3/1/2023
Pre-advertisement information session
- Presentation (PDF 2MB) - posted 2/21/2023
- Registration sign-in sheet (PDF 651KB) - posted 2/21/2023
Project information available
- Submitters list (PDF 36.4KB) - posted 5/18/2023
- Pre-Ad Documents (FTP Directory) - updated 9/15/2023
 The files contained in in ‘Pre-Ad Documents’ folder and all subsequent subfolders are provided as a “draft” for informational purposes. As the projects are continuing to evolve, the information provided in these documents is subject to change. WSDOT makes no representation or warranty as to the accuracy, adequacy, applicability, or completeness of the files. WSDOT shall have no liability or obligation as a result of the inaccuracy, inadequacy, inapplicability, or incompleteness of the files, regardless of the contents thereof.
- Pre-advertisement notice (PDF 123KB) - updated 2/21/2023
- Fact sheet (PDF 617KB) - updated 8/18/2023