Arizona's landslide risk concentrates where weathered granitic and volcanic slopes intersect monsoon-season cloudbursts — SR-89A through Oak Creek Canyon and the foothill cuts along I-17 north of Phoenix see slope failures triggered less by chronic rainfall than by short, intense storms that saturate decomposed granite faster than it can drain.
GSI sees this alongside other Steep Slope Stability Issues work across the state's infrastructure network.
Soil nail walls anchored into Arizona's more competent granitic bedrock beneath the decomposed surface layer give ADOT corridors a repair that survives the next monsoon rather than washing out with it. GSI's soil nailing experience informs this approach.
Because Arizona's failures are flash-triggered rather than chronic, GSI designs drainage systems sized for short-duration, high-intensity monsoon flow rather than the steady seepage drainage systems in wetter states are built to handle. This draws directly on GSI's Soil Nail Launcher™ work.
Decomposed granite that ravels and collapses around a conventional borehole is common on Arizona's steeper cuts — the Soil Nail Launcher™ installs reinforcement before the hole has a chance to close. GSI's horizontal drains capability supports this step.
Where relevant, landslide emergency response is factored into the Arizona project plan from day one.
Engineered for Arizona's conditions. GSI engineers Arizona slope repairs around monsoon-intensity flash saturation, not the gradual chronic seepage that drives slope failure in wetter climates. This is reinforced by GSI's work in general contractors and asset owners.
Design/build delivery. One integrated team owns the full scope — preventing the disconnects between engineering and field execution.
ADOT specification compliance. Design records and field practices satisfy state DOT specifications beginning with initial documentation.
ADOT partners and Arizona infrastructure owners describe GSI's landslide repair results.
GSI's engineers are ready to assess landslide repair conditions at your Arizona site.