Transportation Improvement Board
Performance Management Dashboard

 Projects — TIB Project Information

TIB Project Information

Snohomish County's 180th Street SE

8-1-031(014)-1

8-1-031(014)-1
180th Street SE
SR 527 to 23rd Avenue SE

FY 2020 Urban Arterial Program
Current Phase : Audit
Total TIB Funding : $3,893,041

County: Snohomish   |   Legislative District: 44   |   Project Length: 0.41   |   TIB Engineer: Greg Armstrong   |   Last Payment Date: 03/15/2022

Project Information

Lead Agency SNOHOMISH COUNTY
Funding Year 2020
Program UAP
Current Phase Audit
Legislative District 44, 1
Congressional District 1
Federal Route Number 2592
Project Length 0.41 mi.
ADT 23,453
Functional Class Minor
Type of Work Major Widening
Project Contact Jim Young
Contact Email james.young@snoco.org
TIB Engineer Greg Armstrong
Last Payment Date 03/15/2022
Cultural Resource Assessment Section 106

Project Schedule

  Target Date Actual Date
Project Selection Date   11/16/2018
Delayed Project Date 07/01/2023  
DAHP Assessment Date   12/11/2018
Predesign Approval
Design Approval 01/01/2019 12/14/2018
Bid Auth. Approval 10/01/2019 10/03/2019
Construction Approval 12/13/2019 12/17/2019
Project Closeout 03/31/2022 03/07/2022
Audit Date   03/15/2022
Withdrawn Date  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 0
Right of Way 0 0
Total Design 0 0
     
Construction Engineering 800,000 960,573
Construction Contract 3,200,000 6,352,292
Other Construction 0 6,119
Total Construction 4,000,000 7,318,984
     
Funding Surplus - 106,959  
Total TIB Funding 3,893,041 7,318,984

Local Funding Partners

Funding Amount Percent
SNOHOMISH COUNTY 337,497 4.6%
WSDOT Funding 0 0.0%
Public Works Trust Fund  3,000,000 41.0%
COVID Relief Funds  88,446 1.2%
 
 
 
 
 
 
Total Local Funding 3,425,943 46.8%

Project Description

As presented in this application, widening of 180th St SE significantly reduces the two principal operational deficiences that cause the majority of incidents. Traffic accessing 180th St SE from SR 527 is conflicted by accessing a five lane interection that rapidly reduces to three lanes. Widening to five lanes reduces the conflict currently caused by the short drop lane on the south side of 180th. Westbound traffic will have a full right turn lane and a through lane working together to reduce the abrupt slowing of westbound traffic resulting in rear end collisions. The overall operation of 180th will be enhanced by the additional capacity created by two full through lanes and channelized/signallized turn movements. This will ensure adequate capacity to serve the growth that is projected for the SWUGA by maintaining adequate levels of service (LOS). Environmentally, the project will improve water quality and replace fish barriers. It is important to start implementing this project at the earliest opportunity the County has procured a $3,000,000 Public Works Trust Fund loan to assist with the project cost. An agreement with the Trust Fund Board must be executed by January 19, 2019 or they will rescind their offer.

Existing Condition

180th St SE is an Urban Minor Arterial corridor and strategic E-W connector between two major N-S corridors SR 527, an NHS Route and Core Transit Emphasis Corridor, and 35th Ave SE a Community Based Transit Emphasis Corridor. Except at the intersection with SR 527, it is a three lane roadway with a single through lane in each direction and a center turn lane the posted speed is 35 mph. The corridor currently has an LOS of D and an ADT of 23,453. For funding purposes, improvements have been divided into multiple Phases this application, SR527 to 23rd Ave SE, is phase 1. The project is located in the fastest growing UGA in the County, the Southwest UGA, projected to grow by 34% through 2035 and accommodate 61% of all growth projected for Snohomish County. As can be seen in the attached Collision Diagrams, the portion of 180th St. SE is a high incident corridor. Diagram #1 shows that traffic turning right (east) from SR 527 experiences significant conflict with business driveways due to the short drop lane on the south side of 180th. Diagram #2 shows a predominance of rear end collisions due to the abrupt stopping of all lanes caused by the left turn lane. The three year period covered by this analysis, 2015-2017, increased over the prior three year period from 43 to 52, a 20% increase. Injuries in the same corridor increased proportionally from 20 to 25.

Project Benefits

  • Improves safety;
  • Extends improvements;
  • Relieves congestion;
  • Increases access control;
  • Enhances critical habitat;
  • Builds multimodal facilities

Project Pictures

Project Delays

Delay Type Resolution Date Comments

No delayed project history.

Project Payments