Home of the famous Wedgwood Rock - a 700-ton glacial erratic and proof that your drainage problems are 14,000 years in the making. We fix what the glacier left behind.
Apply for Pilot ProgramThere's a 700-ton boulder sitting at 28th Ave NE and NE 72nd Street. It's been there for about 14,000 years. The Vashon glacier ripped it from Mount Erie on Fidalgo Island, carried it 75 miles south, and dropped it in what would become Wedgwood. Its sister rock - same mineral composition, same origin, confirmed by UW geologist Dr. Terry Swanson - sits 50 miles north in Coupeville on Whidbey Island.
That glacier didn't just leave boulders. It left alderwood soil - the two-layer problem under every yard in this neighborhood. The top 20-40 inches look fine: loose, gravelly loam. But underneath is hardpan - dense glacial till that the ice sheet compacted into something closer to concrete than dirt. Water hits the hardpan and stops. It pools. It saturates. It runs off sideways into Thornton Creek, picks up everything from your driveway and your neighbor's lawn chemicals, and eventually dumps at Matthews Beach.
Every time it rains, Wedgwood's yards are fighting geology. The same glacier that dropped that famous rock also created the drainage problem under your property. A bioswale doesn't fight the hardpan - it works above it, capturing and filtering stormwater before it ever reaches the creek. Engineered layers of native soil, gravel, and deep-rooted PNW plants that can handle both the November deluge and the August dry.
Wedgwood's 1940s-60s homes and generous lots make it ideal bioswale territory. You have the space. The mature tree canopy already intercepts rainfall. A bioswale completes the system - handling what the trees can't absorb, keeping your yard dry, and keeping Thornton Creek clean.
Tailored stormwater and landscaping solutions for your property.
Custom bioswale design for Wedgwood's larger lots and mature landscaping. Seven-layer bioretention that integrates with your existing trees and garden beds.
Comprehensive drainage assessment and stormwater management. Reduce runoff from your property, protect the watershed, and lower your utility costs.
Professional native landscaping that works with Wedgwood's established character. Low-maintenance designs that complement mature tree canopy.
We're selecting 5 founding homeowners in the Thornton Creek and Ravenna Creek watersheds for our first residential bioswale installations. Wedgwood properties - with their space, mature trees, and alderwood soil challenges - are exactly what the pilot was designed for.
Explore the Thornton Creek Watershed