Cedar Park sits near where Thornton Creek meets Lake Washington. The last chance to filter stormwater before it hits the lake.
Apply for Pilot ProgramCedar Park is close to the end of the line. Thornton Creek passes through here on its way to Lake Washington at Matthews Beach. By this point, the creek has collected runoff from every neighborhood upstream - miles of residential streets, commercial corridors, and parking lots.
That makes Cedar Park properties the last filtration opportunity before the creek empties into the lake. When the combined sewer system overflows during heavy storms, raw sewage mixes with stormwater and discharges near the creek mouth. Every property that filters its own runoff reduces the load on that system.
Like everywhere in the watershed, Cedar Park sits on alderwood soil - the glacier's parting gift of loose topsoil over hardpan. A bioswale here captures water at the bottom of the watershed, right where it matters most. You're not just managing your own drainage - you're the last line of defense for Lake Washington.
Tailored stormwater and landscaping solutions for your property.
Custom bioswales designed for Cedar Park's low-gradient, high-water-table conditions. Overflow-safe systems that perform even during the heaviest storms.
Rain gardens, French drains, permeable surfaces, and grading solutions. Capture runoff near the confluence before it reaches the final stretch to Lake Washington.
Full-service landscaping using moisture-tolerant Pacific Northwest natives. Designs that thrive in Cedar Park's riparian-adjacent conditions.
We're selecting 5 founding homeowners for our first residential bioswale installations. Cedar Park's position near the creek mouth makes every bioswale here a direct investment in Lake Washington's water quality.
Explore the Thornton Creek Watershed