NE Lake Joy Road Culvert Replacement Project
Monday, October 18, 2021
The road is now reopen to two-way traffic. Crews will be on site in the area through October as they replant trees and finish up other punch list items. Many thanks to the Lake Joy community for your patience throughout this project. Enjoy your new culvert!
This project replaces an existing 4-foot-round diameter underground metal pipe culvert with a new, 14-foot-wide, eight-foot-high concrete box culvert. The existing corrugated metal culvert is rusting and has outlived its useful life. The larger concrete culvert will help prevent flooding and improve fish passage under NE Lake Joy Road by simulating natural stream conditions.
Why is King County doing this project?
The existing round culvert pipe is failing. It is old and worn out. If the pipe is not replaced, flood water and debris could exceed the capacity of the existing culvert and cause road damage or worse, it could wash the road away completely.
In addition, the existing metal culvert does not meet current design standards for flood control and healthy fish passage. Healthy fish passage requires a culvert that is large enough to handle swift water during storm events. The culvert also must be able to hold enough water during the dry season for fish to swim through.
The new, wider culvert will be built to modern standards It will help prevent flooding and allow fish to migrate freely upstream or downstream with minimal impact.
What to expect during construction
Construction work is expected to last up to 10 weeks.
To do this work, King County must remove a section of NE Lake Joy Road to take out the old, worn out pipe, install the new culvert, and repave the road. Traffic will be diverted onto a temporary bypass lane adjacent to the work zone. The surface of the temporary bypass lane will be made of gravel, and may be uneven in parts. Motorcycles, bicycles and pedestrians should use extra care when using the gravel road. In addition, the temporary bypass lane will be 11-feet wide, and a traffic signal will only allow only one vehicle on the road at a time.