Storm Lake, IA

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Certified Testing Services is your one source for Geotechnical Engineering and Construction Materials Testing needs


The base of a strong foundation starts here.


• Experienced Geotechnical Engineers

• Highly Certified Technicians

• Fast, Accurate and Reliable Results

• Laboratory Certifications including US Army Corps of Engineers, IDOT, NDOT, and more!

(712) 252-5132 Sioux City, Iowa

(712) 213-8378 Storm Lake, Iowa 

Hours:

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Paving the Path for Geotechnical Engineering Professionals

The foundation of any construction project begins with attaining accurate information on the site's subsurface.

You can trust Certified Testing Services, Inc for a fast turnaround time on your reports. We have over 30 years of experience in this industry and maintain a level of professionalism that is unmatched. Call us today to speak with one of our Geotechnical Engineers!

Geotechnical Engineering

From shallow and deep foundation design to deep foundation design, our experts can handle everything. Request a call back!

  • Shallow foundation design
  • Deep foundation design
  • Slope stability analysis
  • Earthen dam design
  • Borrow pit evaluation
  • Building distress analysis
  • Lagoon design
  • Pavement thickness design
  • Bridge soundings
  • Soil classification
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Our Projects

The types of construction testing projects we work on range from commercial and grading to paving and utility.

  • Commercial and grading
  • GeoTech commercial
  • GeoTech municipal
  • GeoTech road
  • Medical
  • Paving and utility
  • Recreational aquatic centers
  • Schools and churches
  • Federal, state, or county-funded
  • Subdivisions and apartments
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Construction Material Testing

Choose our services and we'll test the material used in your construction project. It will ensure that your building is safe.

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Soil Analysis

Need experts to check the soil in your site before starting with the construction? Don't worry! Certified Testing Services, Inc has got you covered.

  • Moisture-density relations
  • Compaction testing
  • Inspection and soil classification
  • Atterberg limits
  • Pile load tests
  • Pile placement inspection
  • Caisson placement inspection
  • Contract drilling services
  • EPS Foam Testing
  • Rammed Aggregate Pier Placement Inspection
  • Constant Head/Falling Head Permeability Testing
  • Consolidation Testing
  • Direct Shear Testing
  • Grain Size Analysis (Hydrometer) Testing
  • Soil Resistivity Testing (Lab and Field)
  • Dynamic Cone Penetrometer Testing
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Concrete Analysis 

Let our highly certified technicians take the worry out of your construction projects.

  • Mix design
  • Production testing and inspection
  • Compressive strength tests
  • Flexural strength tests
  • Iowa DOT-certified plant inspection
  • Diamond bit coring
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Asphaltic Concrete

Our team will monitor the overall quality, composition of the material used in your project. Call our locally owned business to day!

  • Production, testing, and inspection
  • Iowa DOT-certified plant inspections
  • Iowa DOT QMA inspection
  • Diamond bit coring
  • Ignition and Gyratory Super Pave
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Mineral Aggregate Services

Whether you need sieve analysis, specific gravity inspection or Iowa DOT-certified production testing, we do it all. Turn to Certified Testing Services, Inc to all of your mineral aggregate service needs.

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Structural Steel Services

Hire the professionals at  Certified Testing Services, Inc for all types structural steel inspection work. Thanks to our 30 years of experience in the construction testing industry, we know how to keep your jobsite safe.

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Certified Testing Services, Inc

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