North Henderson project area.
Construction will be underway on the Seward Park site between early 2015 and mid 2017. The park remains open, but parking will be affected. View parking map (pdf).
March 16, 2015
Construction at the Seward Park portion of the project continues, with the following activities scheduled for the next several weeks:
While Seattle Public Utilities (SPU) worked to reduce the number of trees that need to be taken down, some will need to be removed to construct the storage tank and adjacent shoreline enhancements. Many of the trees will be reused for shoreline and natural area habitat. In addition, the City has a "2 for 1" tree replacement initiative that requires City projects to replant two trees for every one tree removed. Many new trees will be planted as part of restoration of the construction; the remainder will be planted in Seward Park following construction.
Work in 57th Ave S, adjacent to Martha Washington Park:
February 11, 2015
Construction of the Seward Park portion of the North Henderson Combined Sewer Overflow Reduction project is scheduled to begin the week of February 23. The project team is working to minimize impacts where possible and create a safe work zone within Seward Park. Over the course of the project (construction through mid-2017), impacts will vary by season and the type of construction underway. General construction impacts include:
Over the first few weeks the noticeable activities will include:
While construction impacts will generally be confined to the fenced construction site, we remind everyone to stay safe and cautious of the construction trucks and equipment.
The North Henderson CSO Reduction Project (North Henderson) will reduce the amount of untreated sewage and stormwater that overflows into Lake Washington at two outfalls located offshore of:
To reduce the frequency of sewage overflows to no more than one per year per outfall, on average, SPU plans to complete two new underground storage facilities in North Henderson in 2017 to store excess combined sewage and stormwater during major rain.