145th Street Corridor Project

Last updated: May 5, 2023

Status

Status: Final Design

The 145th Street Corridor project and the 145th Street and I-5 Interchange project share a common project boundary at 1st Avenue NE and will be constructed at the same time. Having one general contractor for both projects will improve traffic control through the work zone and will eliminate conflicts having two contractors in the same area. Additionally, the City should benefit from more competitiveness between bidding contractors with a larger project.

There will be a few pre-construction activities to prepare the site for construction of the Corridor and Interchange project happening soon on NE 145th Street.

The City will pothole 145th Street on the east and west side of I-5 to locate utilities to complete utility relocations design.
Puget Sound Energy (PSE) will also be out this summer to relocate their 8-inch gas main on the west side of I-5 in NE 145th Street from 1st Avenue NE to the I-5 southbound ramps.
Comcast and Zayo Communications will also be out this summer to relocate the line from overhead power poles to an underground joint utility duct bank east of I-5 on NE 145th Street from 5th Avenue NE to 6th Avenue NE.

Project Overview

The City of Shoreline is designing improvements for SR-523 (N/NE 145th Street) between Linden Avenue N, including a transition to Linden Avenue/Interurban Trail and Interstate-5 (I-5). The 145th Street Corridor Project will widen 145th Street to accommodate design elements that will improve traffic operations, safety, and mobility throughout the corridor.

Construction of this corridor project will occur in three phases. Design of the three phases was completed to the 60% level in May 2021. Since then, the focus has shifted to completing the 100% design, acquiring right-of-way, and preparing for construction of Phase 1.

Currently, Phase 1 is finalizing design and expect advertisement of the project for bidding to occur September 2023.

Phases 2 and 3 are funded for design and will require additional funding for right-of-way and construction. The City currently anticipates Phase 2 final design and right-of-way work will be completed in 2023-2025, and construction in 2026-2027, and Phase 3 final design and right-of-way work will be completed in 2026-2028, and construction beginning in 2029.

In support of this project, design of an adjacent, off-corridor bicycle network will begin in 2024, and construction in 2025.

Phase 1: I-5 to Corliss Avenue

Status: Final Design and Preparing for Construction

The City anticipates completion of Phase 1 design to be September 2023. Right-of-way activities for this portion of the project have been completed. Construction of Phase 1 will take place concurrently with the 145th Street and I-5 Interchange project with the first working day expected to be in January 2024.

Phase 1 design is focused on improving intersection safety and operations to reduce delays in traffic and create better access for pedestrians moving along the corridor and accessing the future light rail station at 148th Street and I-5. The project will reflect the Preferred Design Concept approved by the Shoreline City Council on April 11, 2016, as well as feedback from the community.

Design elements include:

Signalized intersection improvements, additional left turn lanes, and signal timing adjustments.
Pedestrian signal at Corliss Avenue.
Improved sidewalks and crosswalks, pedestrian countdown signals, and Americans with Disabilities Act (ADA) accessible curb ramps.

Typical cross-sections and visualizations:

Future design of 145th Street near 1st Avenue, looking west

145th Street future design near 1st Avenue will have a 5-foot amenity zone and a 13-foot-wide sidewalk on the north side of the street, a 5-foot-wide sidewalk on the southside of the street. The east and west bound thru lanes will be 12-feet-wide on the outer north and south sides of the street and 11-feet wide inside lanes. There will be a 12-foot-wide turn lane in the center of the street.

Future design of 145th Street near Sunnyside Avenue, looking west

The design includes two eastbound and two westbound thru lanes, turn lanes, a landscaped median and upgraded pedestrian lighting.

Phase 2: Corliss Avenue to Wallingford Avenue

Status: Design and Securing Funds

Design for Phase 2 is currently at 60% and will be finalized in 2024. The City anticipates completion of Phase 2 right-of-way acquisition near the middle of 2025.

Phase 2 design is focused on improving intersection safety and operations to reduce delays in traffic and create better access for pedestrians moving along the corridor. The project will reflect the Preferred Design Concept approved by the Shoreline City Council in April 2016, as well as feedback from the community.

Design elements include:

Signalized intersection improvements, additional left turn lanes, and signal timing adjustments.
Improved sidewalks and crosswalks, pedestrian countdown signals, and ADA accessible curb ramps.

Typical cross-sections and visualizations:

Future design of 145th Street near Corliss Avenue, looking west

145th Street future design near Corliss Avenue N will have a 5-foot amenity zone and an 8-foot-wide sidewalk on the north side of the street, a 5-foot-wide sidewalk on the southside of the street. The east and west bound thru lanes will be 12-feet-wide on the outer north and south sides of the street and 11-feet-wide inside lanes. There will be a 12-foot-wide median in the center of the street.

Future design of 145th Street near Meridian Avenue, looking west

145th Street future design near Meridian Avenue N will have a 5-foot amenity zone and an 8-foot-wide sidewalk on the north side of the street, a 5-foot-wide sidewalk on the southside of the street. The east and west bound thru lanes will be 12-feet-wide on the outer north and south sides of the street and 11-feet wide for the inside lanes. There will be a 12-foot-wide turn lane in the center of the street.

Phase 3: Wallingford Avenue to Linden Avenue

Status: Design and Securing Funds

Design for Phase 3 is currently at 60% and will be finalized in 2026. The City anticipates completion of Phase 3 right-of-way acquisition near the end of 2028.

Design elements include:

Improved sidewalks and crosswalks and ADA accessible curb ramps.
Signalized intersection improvements and signal timing adjustments at Aurora Avenue N.

Typical cross-sections and visualizations:

Future design of 145th Street near Ashworth Avenue, looking west

145th Street future design near Ashworth Avenue N will have a 5-foot-wide amenity zone and an 8-foot-wide sidewalk on the north side of the street, a 5-foot-wide sidewalk on the southside of the street, and 11-foot-wide thru lane in both east and west directions.

Future design of 145th Street near Stone Avenue, looking east

The design includes two east bound and two west bound thru lanes and upgraded street lighting.

Existing 145th Street, Aurora to I-5, looking west

145th Street currently from Aurora Avenue N to I-5 has 5-foot-wide sidewalks on each side of the street, with two 11-foot-wide thru lanes in both east and west directions.

Project Funding

The design and environmental work for all three phases of the project is estimated to cost approximately $8.44 million, funded through a combination of federal and state grants, and local funding. Overall costs from design through construction are currently estimated at $67.8 million. The City has secured funding for the Phase 1 segment from I-5 to Corliss Avenue. The City continues to seek additional project funding for the construction of Phases 2 and 3.

Phase	Anticipated Design Cost	Anticipated Right-of-Way Cost	Anticipated Construction Cost	Total Anticipated Cost
Phase 1 (I-5 to Corliss Avenue)	$3.56 million	$13.04 million	$12.1 million	$28.7 million
Phase 2 (Corliss Avenue to Wallingford Avenue)	$2.49 million	$7.58 million	$12.89 million (unsecured)	$22.96 million
Phase 3 (Wallingford Avenue to Aurora Avenue N)	$2.39 million	$7.08 million (unsecured)	$8.02 million (unsecured)	$17.49 million
Off-Corridor Bike Network	$471 thousand	--	$769 thousand	$1.24 million

*Unsecured means that project funds are not yet identified, but they may come from either local, state, or federal sources.

Community Outreach and Involvement

The Project reached the 30% design milestone for the entire corridor in spring 2019 following an open house. Members of the public reviewed the design plans, asked questions and provided feedback, which the design team then used to clarify design. This included a community request to incorporate “urban design” elements that enhance the sense of place and quality along the corridor, such as special paving features and a gateway element. In spring 2021, the 60% design milestone was reached. Briefings and one-on-one conversations are ongoing with adjacent property owners, agency partners and stakeholder and neighborhood groups.

The City hosted a virtual open house in June 2022. We have gathered your feedback on the 145th Street Corridor and 145th Street and I-5 Interchange projects. Materials from the virtual open house are available below:

To stay up to date on the 145th Street Corridor Project and receive project updates and notifications for future public engagement events, please visit this webpage or sign up for email alerts.

Additional Information and Resources

In 2015-2016, the City of Shoreline conducted the 145th Street Multimodal Corridor Study to evaluate current conditions for all users of the corridor and consider transportation demands that will be the result of a future light rail station at approximately 148th Street and I-5. By working closely with the community and key stakeholders, the City tailored the improvements to maximize benefit while keeping community impacts to a minimum.

As a result of this study, the City received federal funding for this project and the I-5 Interchange area. A third section of the corridor from I-5 east to Bothell/Lake City Way, part of Sound Transit 3, was approved in November 2016. Sound Transit will be addressing improvements on this eastern portion of 145th Street to incorporate Bus Rapid Transit (BRT) service, working with the City to engage the community and gather feedback from the public.

There are many transportation improvement projects in development that are anticipated to redevelop the 145th Corridor between Linden Avenue and I-5 in the coming years. These transportation improvement projects are being developed by the City of Shoreline, Sound Transit, WSDOT and the City of Seattle. Visit the Destination 2024 webpage to learn more about these projects. In addition, there are also private developer projects between Meridian Avenue N and I-5 that are and will be constructing higher density mixed-use residential buildings along the corridor.

Frequently Asked Questions (FAQs)

Translations

English  If you would like to communicate with the City of Shoreline or review a document in another language, please send your request along with your contact information to clk@shorelinewa.gov or call 206-801-2700.

Spanish   Si quisiera comunicarse con la ciudad de Shoreline o revisar un documento en otro idioma, envíe su solicitud junto con su información de contacto a clk@shorelinewa.gov o llame al 206-801-2700.

Chinese (Traditional)  如果您想與 City of Shoreline 進行交流或檢視以另一種語言提供的文件，請將您的請求連同您的聯絡資訊發送到 clk@shorelinewa.gov 或請致電 206-801-2700。

Chinese (Simplified)  如果您想与 City of Shoreline 进行交流或查看以另一种语言提供的文档，请将您的请求连同您的联系信息发送到 clk@shorelinewa.gov 或请致电 206-801-2700。

Korean  City of Shoreline에 연락하고 싶거나 다른 언어로 된 문서를 검토하려면 연락처 정보와 함께 요청서를 clk@shorelinewa.gov로 제출하거나 206-801-2700번으로 전화해 주십시오.

Vietnamese  Nếu quý vị muốn liên hệ với Thành phố Shoreline hoặc đọc tài liệu bằng ngôn ngữ khác, vui lòng gửi yêu cầu cùng với thông tin liên hệ tới địa chỉ clk@shorelinewa.gov hoặc gọi 206-801-2700.

Tagalog  Kung gusto mong makipag-usap sa Lungsod ng Shoreline o suriin ang isang dokumento sa ibang wika, pakipadala ang iyong kahilingan kasama ng iyong impormasyon sa pakikipag-ugnayan sa clk@shorelinewa.gov o tumawag sa 206-801-2700.

Amharic  የሾርላይን ከተማ ጋር ለመገናኘት ከፈለጉ ወይም አንድን ሰነድ በሌላ ቋንቋ ለመከለስ ከፈለጉ ጥያቄዎን ከመገኛ መረጃዎ ጋር በማድረግ በ clk@shorelinewa.gov ላይ ኢሜይል ያድርጉ ወይም በ 206-801-2700 ላይ ስልክ ይደውሉ።

Tigrigna  ምስ ከተማ ሾርላይን ክትዘራረቡ ወይ ድማ ሰነዳትኩም ብካልእ ቋንቋ ከተገምግሙ ምስ እትደልዩ፡ ጠለባትኩም ምስናይ ናይ መርከቢ ሓበሬታኹም ናብ clk@shorelinewa.gov ስደዱ ወይ ድማ ብቑጽሪ 206-801-2700 ደዉሉ።

Russian  Если вы хотите связаться с представителями города Шорлайн (Shoreline) или ознакомиться с документом на другом языке, отправьте запрос вместе со своими контактными данными на адрес clk@shorelinewa.gov или позвоните по телефону 206-801-2700.

Japanese  City of Shoreline とのご連絡、または他の言語での資料閲覧をお望みでしたら、お客様のご連絡先を添えたリクエストをclk@shorelinewa.gov まで送信いただくか、 206-801-2700 までお電話をお願いいたします。

Khmer (Cambodian)  ប្រសិនបើលោកអ្នកចង់ប្រាស្រ័យទាក់ទងជាមួយទីក្រុង Shoreline ឬពិនិត្យឯកសារឡើងវិញជាភាសាផ្សេងទៀត សូមផ្ញើសំណើរបស់អ្នកជាមួយព័ត៌មានទាក់ទងរបស់អ្នកទៅ clk@shorelinewa.gov ឬហៅទូរស័ព្ទទៅលេខ 206-801-2700។

City of Shoreline

N/NE 145th Street: Linden Avenue N to I-5

Status

Project Overview

Phase 1: I-5 to Corliss Avenue

Phase 2: Corliss Avenue to Wallingford Avenue

Phase 3: Wallingford Avenue to Linden Avenue

Project Funding

Community Outreach and Involvement

Additional Information and Resources

Translations

News