The Columbia River Gorge, Snoqualmie Pass on I-90, and Highway 20 through Rainy Pass expose Washington motorists to persistent rockfall from fractured basalt, andesite, and metamorphic rock formations. GeoStabilization International designs and installs attenuator barriers, pattern rock bolt systems, and precision scaling programs along Washington's most critical corridors. Our rope access Rockfall Remediation Technicians work directly on vertical rock faces—eliminating the need for access roads that delay projects and damage slope environments.
WSDOT and Washington's transportation partners rely on GSI because we own the engineering capability, the specialized equipment fleet, and the field crews—all under one design/build contract.
The Columbia River Gorge exposes massive basalt columns along SR-14, Snoqualmie Pass on I-90 features fractured granodiorite cliffs above the highway, and Highway 20 through Rainy Pass traverses metamorphic rock formations prone to freeze-thaw spalling. These corridors experience rockfall events year-round, with spring freeze-thaw cycles and fall rain events driving peak activity. WSDOT manages rockfall hazards across hundreds of miles of mountain highway, requiring protection systems engineered for Washington's specific geology and climate.
GeoStabilization International designs attenuator barriers rated for 3,000+ kJ impact energies, pattern rock bolt systems that mechanically pin unstable blocks, and draped TECCO® mesh that contains detached rock against the slope face. Each system is specified using 3D rockfall trajectory simulation, block kinematic analysis, and impact energy calculations calibrated to the site's rock mass properties and slope geometry.
Many of Washington's most critical rockfall zones involve steep or vertical rock faces directly above highways with minimal shoulder width. Our Rockfall Remediation Technicians and SPIDER excavators install protection from the face itself—no highway closures, no scaffolding, and no environmental damage from access road construction. This means your rockfall mitigation project starts faster, costs less, and keeps the highway open during construction.
When a rockfall event closes a Washington highway, every hour of closure compounds economic losses and public safety risk. GeoStabilization International maintains 24/7 emergency rockfall response with specialized equipment pre-staged across the Pacific Northwest. Our emergency scaling crews, rope access technicians, and mobile barrier systems deploy within hours—not the days or weeks that competitors require to mobilize from out of region. One call starts the response; one contract covers the entire scope.
GeoStabilization International's design/build approach delivers results that earn repeat business and long-term partnerships.
From the Columbia River Gorge to Snoqualmie Pass, GeoStabilization International delivers rockfall protection that keeps corridors safe and open. Contact our rockfall engineers today.
