Landslide Repair in Arizona

Engineered landslide repair across Arizona—I-17. Design/build solutions for ADOT corridors and critical infrastructure.

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Road and slope severely damaged by heavy rain landslide

Landslide Repair Across Arizona

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.

Geohazard Mitigation in Arizona

Landslide Repair in AZ?

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How GSI Delivers Landslide Repair in Arizona

Soil Nail Wall Reinforcement

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.

Deep Drainage Systems

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.

Launcher Technology for Difficult Soils

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.

Arizona Landslide Repair Process

GSI follows a systematic five-step process to deliver landslide repair solutions in ADOT corridors and beyond.

Step 1

Site Assessment

GSI engineers evaluate conditions and severity at your Arizona site.

Step 2

Root Cause Investigation

In-house geologists investigate the specific conditions driving the issue, referencing Arizona's desert sandstone and volcanic formations with monsoon-driven flash flood exposure.

Step 3

Engineered Solution Design

Custom design matched to Arizona's site-specific geology, hydrology, and infrastructure loading.

Step 4

Design/Build Execution

One team executes the engineered solution under a single ADOT-ready contract.

Performance Warranty

Design/build/warranty coverage on every landslide repair solution installed in Arizona.

Performance Warranty

Design/build/warranty coverage on every landslide repair solution installed in Arizona.

Soil nail launcher equipment for rapid installation

Why Arizona Trusts GSI for Landslide Repair

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.

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Arizona Clients Report on Landslide Repair

ADOT partners and Arizona infrastructure owners describe GSI's landslide repair results.

Landslide Repair for Infrastructure in California

“I would like to thank you and the county for repairing the road slide on Dunne avenue. The repair is excellent and the contractors were very efficient and skilled. You personally did a great job of providing information about the status of the project. My family appreciates your efforts.”

Emergency Landslide Repair in Wyoming

In 2017, another well above normal snowpack winter and heavy spring rains resulted in 23 new landslides, which damaged or threatened WYDOT roads. WYDOT turned to GSI to help respond to these emergency situations. GSI was able to respond very quickly and in most cases had personnel on site to assess the site within 24 hours. They would provide a proposal for remediation with a preliminary design and estimated costs within 48 hours in most cases. During 2017, GSI was selected to perform remediation with contracts at six separate sites. In all cases, they were prepared to mobilize to the sites and begin work within a week of being given notice to proceed.

A unique element of these emergency contracts was a partnership, between WYDOT and GSI, by which WYDOT provided some logistical support such as traffic control and providing water for drilling operations so that GSI could focus its efforts on performing the specialty work. This arrangement resulted in cost effective, efficient, successful projects. When responding to emergency landslide repair, time truly is money, the sooner a landslide can be remediated before it has a chance to grow, the less expensive it is to repair. In the past, WYDOT has experienced situations in which, landslides could possibly have been remediated quicker, experienced further failure during drawn out conventional design and contracting methods resulting in higher costs due to the additional failure. GSI uses various types of innovative geo-technology in their landslide remediation projects….

All of these projects were completed on schedule, even with cold weather conditions and snow storms ….

All of the stabilization projects that GSI completed for WYDOT included a warranty to repair any of the remediation that would happen to fail, but to date none of the work that they have performed has required any repair. I would highly recommend GeoStabilization International to perform emergency landslide and slope remediation work. They have the resources, personnel, and expertise to respond to your emergency in a timely, professional manner.

Landslide Repair for Transportation Infrastructure in Oregon

GSI under commits and over delivers. Work is always completed ahead of time and on budget… [They are] competitive with more conventional slide repairs, but much more timely and minimizes impacts to traffic.

Landslide Repair in Arizona

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GSI's engineers are ready to assess landslide repair conditions at your Arizona site.

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