LWL provides geotechnical investigations for a variety of residential, commercial, and public projects including transportation, infrastructure, water, and wastewater projects. Our investigations typically include testhole drilling & logging, field sampling, visual identification of soils, laboratory testing, and geotechnical analysis in order to provide geotechnical recommendations for specific project requirements, such as:

• Site preparation (excavations, subgrade preparation, backfill, utilities, etc.)
• Foundation type and depth (strip and spread footings, piles, slabs-on-grade, etc.)
• Soil design parameters for foundation design
• Frost penetration depth
• Development setback lines for top-of-bank properties
• Site grading, drainage, and maintenance recommendations

LWL provides geotechnical expertise and assessments, including:

• Inspections of foundations and cracking systems
• Settlement
• Frost heave
• Forensic engineering
• High groundwater table issues
• Slope stability issues

LWL's design services are focused on:

• Foundation structures (strip and spread footings, cast-in-place piles, screw piles, etc.)
• Grading and drainage Plans
• Retaining walls (segmental, MSE, gravity, etc.)
• Shoring systems
• Slope stabilization measures
• Dewatering and subsurface drainage systems
• Underpinning of foundations
• Road structures
• Earth structures (embankments, dikes, and small dams)
• Storm and wastewater lagoons

LWL is capable of numerically modeling and analyzing a variety of geotechnical problems, including:

• Limit-equilibrium slope stability analysis (SLOPE/W, GSLOPE, etc.)
• Finite element (FE) slope stability and stress deformation analyses (SIGMA/W)
• Finite element settlement analysis (SIGMA/W)
• Numerical Seepage Analysis (SEEP/W)
• Lateral Pile Analysis (LPILE)

LWL provides installations and monitoring services of various geotechnical instrumentation, including:

• Vertical Inclinometers
• Piezometers (standpipes, pneumatic piezometers, etc.)
• Settlement cells
• Settlement surveys
• Concrete wall/slab crack monitoring

We assist our clients in managing various aspects of their project, including designs, bidding, and field supervision. As part of our construction support services, we offer geotechnical support in:

• Pile inspections (cast-in-place piles, screw piles, etc.)
• Subgrade soil inspections for foundations, roads, and other structures
• Proof rolling
• Excavations and backfill inspection
• Slope stabilization
• QA/QC in-situ and laboratory verification
• Testhole/test-pit logging and sampling