King County is working closely with Seattle Public Utilities to coordinate our projects and complement our community engagement efforts. To learn more about Seattle Public Utilities drainage projects in South Park, visit: http://www.seattle.gov/util/myservices/drainagesewer/projects/southparkprojects/
February 20, 2014
King County brings solutions to stormwater pollution in the Duwamish.
Learn more about our work to reduce sewer overflows and promote green solutions by downloading the February 2014 newsletter (PDF) and map of possible GSI Roadside Locations and RainWise eligible boundary (PDF).
El condado de King proporciona soluciones a la contaminacion por agua de lluvia en South Park y Highland Park. Aprenda mas acerca de nuestro trabajo para reducer los desbordes de alcantarillas y promover soluciones verdes.
Like many cities around the country, the older parts of King County’s sewer system use a single set of pipes to carry sewage and stormwater to a treatment plant. During big rain storms, the pipes can fill up with stormwater leading to overflows of stormwater and sewage into nearby rivers, streams, and Puget Sound. Although these overflows prevent sewage backups into homes and streets, they also pose public health concerns. When sewer pipes in the Highland Park and South Park neighborhoods get too much stormwater, the polluted water overflows into the Duwamish River.
This project is exploring the feasibility of reducing overflows using Green Stormwater Infrastructure (GSI) or a combination of GSI and storage for sewer overflows. GSI keeps stormwater out of the sewer system and allows it to slowly soak into the ground using rain gardens, permeable pavement, and/or specially designed tree boxes. Two neighborhoods – South Park and Highland Park – have been identified as possible GSI areas based on relatively flat streets, wide planter strips or roads, and the types of soil that allow stormwater to soak in.
An early action in this area is the implementation of the RainWise incentive program that provides rebates to property owners who install rain gardens and cisterns on their property. The program is available now through 2015.
Any remaining stormwater will be controlled with a storage pipe option starting in 2019.