Barton CSO Control Project
Green stormwater infrastructure
November 4, 2013 Project Update
To make room for the future bioretention swales, 24 trees will be transplanted over the next two weeks across the Barton CSO Control project area. Learn more here.
Barton basin and project location.
Barton CSO Control Project area (PDF, updated May 2013).
King County will construct bioretention swales, a type of green stormwater infrastructure, in the City of Seattle’s planting strips in the Sunrise Heights and Westwood neighborhoods. Street runoff will be diverted away from storm drains and into the vegetated swales. Once in the swales, the water will filter through soil to an underdrain, which will take the water to a deep well for slow infiltration underground.
In 2008, King County reported that the Barton Pump Station averages 4 overflows per year that discharge approximately 4 million gallons of raw sewage and untreated stormwater into Puget Sound near the Fauntleroy ferry dock. King County is working to meet current regulations set by the Washington Department of Ecology that require no more than one untreated discharge per year on a long term average. Taking stormwater out of the conveyance system in Sunrise Heights and Westwood will reduce these combined sewer overflows (CSOs).
What you can expect during construction
- Bioretention swales constructed in two seasons – March to October 2014 and March to October 2015
- Each block will take approximately two months to complete
- Work hours in compliance with City of Seattle permits, which typically allow work between 7 am and 6 pm Monday to Friday
- Local access at all times for homeowners and emergency vehicles
- Pedestrian access at all times
- Restricted parking while street is in construction
Being a good neighbor
King County is committed to being a good neighbor and will work directly with the community throughout construction to minimize impacts whenever possible. Residents can expect:
- Advance notice of construction activities and expected impacts via mail, email, phone and project fliers
- One-on-one problem solving with residents directly impacted by construction activities
- Weekly project website and construction updates
- 24 hour construction hotline. Response from live person within one business day of call.
Download project schedule (PDF, updated June 2013).