Barton CSO Control Project
Green stormwater infrastructure
March 6, 2014 Project Update --
Dear Sunrise Heights and Westwood Neighbors,
As I’m sure you’ve noticed, King County’s contractor, Goodfellow Brothers, Inc., has been busy preparing for construction of the bioretention swales in your neighborhood. Deep wells have been drilled on four blocks, and small or unhealthy trees have been removed in future swale areas. The swale system, to be installed on 15 blocks over the next two years, will remove enough stormwater runoff from the sewer system to reduce sewer overflows into Puget Sound during heavy rains.
Starting next week, street work begins on the 7300 block of 34th Avenue Southwest. The first week of construction will focus on moving water lines out of the way of the future swale area. This work requires removing street panels to access the lines, so the southern half of the block will be closed to through traffic during the day and reopened in the evening. See the attached notification for more information on what to expect during this first week of work.
Learn more about the construction schedule, sequence of activities and anticipated neighborhood impacts in the winter 2014 newsletter.
24-hour construction hotline: 206-205-9184
Barton basin and project location.
Barton CSO Control Project area
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.
View here (PDF, 18MB), a summary of improvements, along with information on plant palettes and trees.
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).