Washington's saturated glacial till, volcanic soils, and steep Cascade Range terrain produce some of the Pacific Northwest's most destructive landslides. From the SR-2 Stevens Pass corridor to US-2 through Skykomish, I-90 at Snoqualmie, and the Highway 20 North Cascades route, WSDOT manages chronic slope instability that demands engineered solutions—not temporary fixes. GeoStabilization International deploys Soil Nail Launcher™ technology, slope pinning, and draped mesh systems across Washington's highest-priority corridors.
Our design/build model eliminates the coordination gap between engineering consultants and construction contractors—one team designs, builds, and warranties every landslide repair we deliver in Washington state.
Washington state experiences more rainfall-triggered landslides than nearly any other region in North America. Saturated glacial deposits across the Cascades, volcanic ash soils in the central corridor, and ancient landslide complexes throughout the Puget Sound lowlands create slope instability that threatens WSDOT highways from the coast to the mountain passes. The Oso landslide of 2014 demonstrated the catastrophic potential of Washington's unstable ground—and the critical importance of engineering solutions that address subsurface failure mechanics.
GeoStabilization International's patented Soil Nail Launcher™ installs SuperNails™ at approximately 250 mph without excavation or drilled boreholes. In Washington's saturated, collapse-prone glacial soils, this technology installs reinforcement where conventional drilling methods cannot maintain an open borehole. The Launcher works in actively moving slide masses—stabilizing the failure while it's still in motion, eliminating the need to wait for conditions to stabilize before work can begin.
When a slope fails on SR-2, I-90, or Highway 20 during a Pacific storm, WSDOT needs a contractor who can respond in hours—not weeks. GeoStabilization International maintains 24/7 emergency mobilization with pre-staged equipment and Pacific Northwest crews. Our emergency team assesses the failure, designs the solution, and begins construction under one integrated design/build scope.
Washington's saturated glacial tills and volcanic ash soils collapse conventional boreholes before casing can be installed—making traditional drilled soil nails impractical across many of the state's worst landslide sites. GeoStabilization International's Soil Nail Launcher™ eliminates this limitation entirely, firing SuperNails™ into collapsing ground at 250 mph. No borehole. No casing. No waiting for ground conditions to improve. This technology is why WSDOT and Washington's infrastructure community turn to GSI for their most challenging slope failures.
Over 6,000 projects completed—here's what our clients have to say about working with GeoStabilization International.
Our Pacific Northwest team is standing by for your Washington slope failure. Soil Nail Launcher™ technology deploys at emergency speed. Contact GeoStabilization International now.
