Geotechnical & Soils
Slope Stability and Landslide Assessment
Evaluation of slopes, landslides and erosion threatening homes, roads or development, with stabilization design. Typical US fees run $3,000 to $30,000, and most projects take 3 to 12 weeks. Our drawings, calculations and reports are sealed by a Professional Engineer (PE) licensed in the state where your project is located, ready for permit submission.
What the work involves
Engineers evaluate slope geometry, soils, groundwater and movement history, run stability analyses, and design fixes such as drainage, regrading, retaining structures, soil nails or vegetation. Landslides are often triggered by water, so drainage is central. In some states an engineering geologist is also required.
When you need it
- Cracks at the top of a slope or bulging at the toe
- Leaning trees, fences or walls on a hillside
- Slide after heavy rain
- Building near the top or bottom of a slope
What you receive
- Site reconnaissance
- Borings and instrumentation
- Slope stability report
- Stabilization design
What drives the cost
Estimate. Small residential assessments are at the low end; instrumented landslide investigations are higher.
Related calculators
Frequently asked questions
How much does slope Stability and Landslide Assessment cost?
Across the US, slope Stability and Landslide Assessment usually costs $3,000 to $30,000. Estimate. Small residential assessments are at the low end; instrumented landslide investigations are higher.
How long does slope Stability and Landslide Assessment take?
Plan on 3 to 12 weeks from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.
Do I need a licensed PE for slope Stability and Landslide Assessment?
In most US jurisdictions, yes. When the work needs a permit, the plans, calculations or report usually must be sealed by a Professional Engineer licensed in the state where the project is located. Every deliverable we issue for permit is sealed that way.
Will I also need a geotechnical engineer?
Sometimes. Depending on the site, slope Stability and Landslide Assessment can also involve a geotechnical engineer, engineering geologist or land surveyor. We tell you up front which other professionals your project needs and coordinate with them so the drawings agree.
Who do you provide slope Stability and Landslide Assessment for?
Most of our clients for this service are homeowners, municipalitys, developers and insurers. Describe your project and one of our engineers will reply with scope, fee and schedule.
Does homeowner insurance cover landslides?
Standard policies commonly exclude earth movement; separate coverage may exist. Ask your agent about difference in conditions or specialty coverage.
Why is water a trigger?
Water adds weight and reduces soil strength. Fixing leaks and redirecting runoff are often the first steps.
What is a soil nail wall?
Steel bars drilled into the slope and faced with shotcrete to stabilize it. It is common where space for a conventional retaining wall is limited.
Where can I see landslide maps?
USGS and state geological surveys publish landslide inventory maps. These maps show general hazard, not site-specific conditions.
Where we provide this service
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming