212th Ave SE at Ebright Creek
Project Overview
A study of 212th Avenue SE crossing Ebright Creek is being conducted to address roadway stability and flooding. The goal is to determine a cost-effective and sustainable solution to keep the roadway open and mitigate for hazards. The results of the study will guide future budgets for repair and improvement efforts.
The 212th Avenue SE corridor is a critical north-south connection on the west side of the city. It crosses Ebright Creek and its adjoining wetland just south of SE 14th Place. The loose wetland soils are being compacted by the weight of the road, causing it to slowly sink. The combination of the settling road and changing environment appear to be increasing the frequency of roadway flooding during the winter, and the existing gabion baskets supporting a section of roadway are deteriorating.
- Timeline: Q3-Q4 of 2024
- Project Status: Planning
- Funding: $150,000
What's the latest?
2024, Quarter 2
Staff is seeking proposals from consultants to perform the study which will evaluate concepts for mobility, life cycle cost and resiliency. The study will begin in July of 2024.
History and Background
The 212th Avenue corridor (originally called Louis Thompson) was established in 1916 and constructed of gravel. At that time the Ebright Creek wetland was a cranberry marsh. Over the years the road has been updated and improved. The most recent update for this section of roadway was in 2003 when the Crossings at Pine Lake development was constructed. The improvement replaced the concrete barrier on the west side of the roadway with a sidewalk.
The roadway sits on top of multiple soil layers deposited by glaciers and stream activity. There is a significant layer of alluvium soils and peat - clay, silt, sand or gravel and organic soil formed by plant decay - which has been loosely deposited by running streams over thousands of years. These loose layers of material continue to slowly settle over time.
Environmental factors like weather, wildlife, and human modifications have an impact on rainwater flowing through the creek and wetland. These factors cause the water levels to rise during large storm events and combined with the settling soils, lead to increased amounts and frequencies of roadway flooding.
In 2021, the City applied for a FEMA BRIC grant (Building Resilient Infrastructure and Communities) to repair the roadway but design work had not yet been initiated and the project was not able to advance for final scoring.
Timeline
The roadway study is occurring in 2024, future work is yet to be determined.
Funding
This study is funded with local dollars programed in the Transportation Capital Improvements and Surface Water Capital Projects Funds
Additional Information
