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TIB Project Information

City of Shoreline's 145th Street (SR 523)


145th Street (SR 523)

3rd Ave NE to 5th Ave NE (I-5 Interchange)

FY 2023 Urban Arterial Program
Current Phase : Design
Total TIB Funding : $5,000,000

County: King   |   Legislative District: 32   |   Project Length: 0.13   |   TIB Engineer: Greg Armstrong   |   Last Payment Date: 02/09/2023

Project Information

Funding Year 2023
Program UAP
Current Phase Design
Legislative District 32, 46
Congressional District 7
Federal Route Number 0523
Project Length 0.13 mi.
ADT 30,000
Functional Class Principal
Type of Work Traffic Control
Project Contact Nytasha Walters
Contact Email
TIB Engineer Greg Armstrong
Last Payment Date 02/09/2023

Project Schedule

  Target Date Actual Date
Project Selection Date   11/19/2021
Delayed Project Date 07/01/2026  
Predesign Approval
Design Approval 02/19/2022 02/24/2022
Bid Auth. Approval 05/09/2023
Construction Approval 06/06/2023
Project Closeout 01/28/2025
Audit Date  
Withdrawn Date  

Project Funding

TIB Funds Project Costs
Environmental Study 0 0
Design Study 0 0
Total Predesign 0 0
Special Study 0 0
Design 0 4,500,000
Right of Way 1,000,000 5,000,000
Total Design 1,000,000 9,500,000
Construction Engineering 520,000 2,500,000
Construction Contract 3,480,000 18,200,000
Other Construction 0 0
Total Construction 4,000,000 20,700,000
Total TIB Funding 5,000,000 30,200,000

Local Funding Partners

Funding Amount Percent
SHORELINE 1,387,500 4.6%
WSDOT Funding 0 0.0%
Federal STP (Design)  3,892,500 12.9%
Federal STP (CN)  4,920,000 16.3%
Sound Transit  10,000,000 33.1%
Regional Mobility  5,000,000 16.6%
Total Local Funding 25,200,000 83.5%

Project Description

Improvements include replacing two signalized intersections with modern roundabouts and repurposing the bridge deck to remove the left turn pockets (not needed with roundabouts) in order to add a wide pedestrian/bicycle facility. The proposed improvements will substantially benefit access, mobility, and safety for all modes of transportation. The project will reduce congestion and improve mobility for buses and vehicles and raise the interchange level of service from poor or failing intersections to intersections operating at acceptable levels. The design will enable 35,000 vehicles and ultimately over 40,000 transit riders to reliably travel across the corridor to reach the light rail station and other destinations, supporting and sustaining a good quality of life and a booming regional economy. By constructing an appropriate pedestrian/bicycle facility on the bridge deck, accidents will be reduced by providing those users a wider space on the bridge deck that is not in conflict with vehicles.

Project Pictures

Project Delays

Delay Type Resolution Date Comments

No delayed project history.

Project Payments