DHDC Engineering Consulting Services, Inc.

Comprehensive subsurface investigations, drilling, and geotechnical design services for buildings, bridges, roadways, tunnels, airports, and rail infrastructure.

• Soil Borings and Subsurface Investigations

  Field drilling, soil sampling, and standard penetration testing to characterize geologic and groundwater conditions.

• Foundation, Retaining Structure, and Tunnel Design

  Engineering analysis and design support for shallow and deep foundations, earth retaining structures, and major tunnels.

• Dewatering Design, Soil Stabilization, and Borrow Suitability

  Subgrade engineering, soil improvement recommendations, dewatering designs, and evaluation of borrow materials.

• Failure Investigation Analysis

  Forensic geotechnical investigations to determine the cause of foundation movements, slope failures, or pavement distress.

(SUE) services to locate, map, and verify underground utilities using non-destructive technology and vacuum excavation.

• Ground Penetrating Radar (GPR) Utility Mapping

  Two-dimensional horizontal mapping of underground utilities and anomalies using electromagnetic sensors and ground penetrating radar.

• Hydro Vacuum and Air Knife Utility Exposure

  Pneumatic and vacuum excavation methods to safely expose buried utilities for precise verification of depth, size, and material type.

Field testing, laboratory analysis, and certified special inspections for soils, concrete, asphalt, and structural steel under certified quality management systems.

• Field and Laboratory Materials Testing

  AASHTO-accredited testing of construction aggregates, concrete, asphalt, and soils to verify compliance with project specifications.

• Ohio Building Code Chapter 17 Special Inspections

  Certified structural inspections for building systems in accordance with Ohio Building Code Chapter 17 requirements.

Environmental consulting and site assessment services to identify environmental liabilities and support sustainable property redevelopment.

• Environmental Site Assessments (ESA)

  Phase I and Phase II environmental site assessments to identify recognized environmental conditions prior to property transactions or redevelopment.