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CIVIL & STRUCTURAL ENGINEERING

Geotechnical

Bridge Design & Inspection

CONSTRUCTION INSPECTION

TRANSPORTATION

Related Services

Stahl Sheaffer provides geotechnical solutions with a 5,000 sf full-service soils and materials lab in Washington County. We specialize in Full Depth Reclamation (FDR) mix designs to support roadway construction. Our services include subgrade testing, embankment stabilization testing, and roadway coring - allowing us to recommend effective FDR mix designs and provide quality control monitoring during construction to ensure efficient soil stabilization. Stahl Sheaffer also offers subgrade and pavement testing, foundation design, slope stability analysis, and settlement analysis. We create customized reports containing all of the data to reliably plan and execute roadway and pavement projects, complete with details about the tests, maps, photos, lab results, and specific recommendations based on those results.

  • Accredited Testing of Soils, Aggregate, Rock and Asphalt Mixtures

  • Full-Depth Reclamation (FDR) Mix Designs

  • Pavement Design & Analysis

  • Foundation Design & Analysis

  • Slope Stability & Pile Analysis

  • Roadway Cores & Dynamic Cone Penetrometer (DCP) Testing

  • Moisture Density / Compaction Testing using InstroTek Nuclear Gauges

Services

Geotech Projects

I-64 Merritts Creek Interchange Scan

West Virginia Roadway Improvement Initiative

West Virginia Roadway Improvement Initiative Bundled Bridge Project

St. Joseph's Parish Parking Lot Analysis

SR 3016 McCracken Roadway Improvement Project

Cell Tower Survey and Land Development

FEMA Slip Repairs

Parking Lot Geotechnical Analysis & FDR Mix Designs

Cell Tower Site Design

Penn State Beaver Stadium Sideline Improvements

Rivers Landing New Mixed-Use Building

SR 44 Coudersport Pike Partnership Project

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Standard Lab Testing

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SOIL

  • Moisture Content (AASHTO T 255 and AASHTO T-265/ASTM D2216)

  • Moisture Content by Speedy Moisture Tester (AASHTO T-217 / ASTM D4944)*

  • Plasticity Index | Plastic Limit (PL) & Liquid Limit (LL) (AASHTO T-89 & T-90/ASTM D4318)

  • Specific Gravity (AASHTO T-100 / ASTM D854) 

  • Dry Preparation of Samples (AASHTO R-58 / ASTM D421) 

  • Hydrometer & Sieve Analysis (AASHTO T-88 / ASTM D422) 

  • Wet Sieve (% passing #200) (ASTM D1140)

  • Standard Proctor (AASHTO T-99 / ASTM D698)

  • Modified Proctor (AASHTO T-180 / ASTM D1557) 

  • Correction of Unit Weight and Water Content for Soils Containing Oversize Particles (ASTM D4718)*

  • Unit Weight of Soil (Direct Measure with and without wax) (AASHTO T-233 / ASTM D7263)*

  • In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods 
    (AASHTO T-310 / ASTM D6938)

  • Soil Classification (ASTM D2487)

  • Description & Identification of Soils (Visual-Manual) (ASTM D2488)

  • Unconfined Compressive Strength of Cohesive Soil (AASHTO T-208 / ASTM D2166)

  • California Bearing Ratio (CBR) (ASTM T-193 / ASTM D1883)

  • Dynamic Cone Penetrometer (DCP) (ASTM D6951)

  • Soil Resistivity (AASHTO T-288 / ASTM G57/ G187)* 

  • Organic Content in Soils by Loss on Ignition (AASHTO T-267 / ASTM D2974)

CONCRETE

  • Compressive Strength (AASHTO T-24 / ASTM C39)

  • Slump of Hydraulic-Cement Concrete (ASTM C143)

  • Air Content (Pressure Meter) (ASTM C231)

  • Making and Curing Concrete Test Specimens in the Field (ASTM C31)

​* Testing is available, however, not AASHTO accredited.

SOIL-CEMENT & SOIL-LIME MIXTURE(S)

  • Moisture-Density Relationship of Soil-Cement Mixtures (AASHTO T-134 / ASTM D558)

  • Unconfined Compressive Strength of Soil-Cement Mixture (ASTM D1633)*

  • Wet-Dry Durability of Soil-Cement Mixture (AASHTO T-135 / ASTM D559)*

  • Moisture-Density Relations of Soil-Lime Mixtures*

  • Unconfined Compressive Strength of Soil-Lime Mixture (AASHTO T-220 / ASTM D5102)*

ASPHALT MIXTURE(S)

  • Asphalt Content by Ignition Method (AASHTO T-308 / ASTM D6307)*

  • Bulk Specific Gravity (Gmb) using Saturated Surface-Dry (SSD) Specimens (AASHTO T-166 / ASTM D2726)*

  • Theoretical Maximum Specific Gravity (Gmm) (AASHTO T-209 / ASTM D2041)*

  • Thickness of Asphalt Cores (ASTM D3549)*

  • Percent Air Voids in Bituminous Paving Mixtures (AASHTO T-269 / ASTM D3203)*

  • Specific Gravity & Density Using Paraffin (AASHTO T-275 / ASTM D1188)*

  • Moisture Content of HMA by Oven (AASHTO T-329)*

  • Density of Bituminous Concrete In Place by Nuclear Methods (AASHTO T-355 / ASTM D2950)

ROCK

  • Compressive Strength of Rock Cores (Method C without D4543 preparation) (ASTM D7012)*

  • Slake Durability (ASTM D4644)*

  • ​Point Load Strength Index (ASTM D5731)*

AGGREGATE

  • Aggregate Gradation (AASHTO T-27 / ​ASTM C136)

  • Materials Finer Than 75-μm (No. 200) Sieve in Mineral Aggregates by Washing (AASHTO T-11 / ASTM C117)

  • Sieve Analysis of Extracted Aggregate (AASHTO T-30 / ASTM D5444)*

  • Moisture Content of Aggregate by Oven Drying (AASHTO T-255 / ASTM C566)

Send a request to our Geotech team.

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