Thompson, Dreessen & Dorner, Inc.

Comprehensive civil site development and infrastructure design services tailored to commercial, residential, municipal, and recreational environments.

• Site Design

  Designing master plans, layouts, and site grading to align with geographic opportunities and constraints.

• Subdivision Design

  Planning and design for single-family residential and mixed-use master planned neighborhoods.

• Roadway Design

  Pavement, roadway layout, and traffic systems design, including asphaltic and Portland cement projects.

• Stormwater Management

  Storm water management and pollution prevention plan design (SWPPP) to manage runoff and erosion.

• Sanitary and Storm Sewers

  Wastewater and stormwater collection system planning and layout.

• Water Systems

  Design and analysis of clean water distribution networks.

Structural analysis and design services for healthcare, educational, commercial, residential, and municipal developments.

• Retaining Wall Design

  Structural design and detailing for commercial and civil retaining wall installations.

• Pedestrian Bridges

  Structural engineering and structural analysis of pedestrian bridges and recreational trails.

Precision surveying and mapping solutions utilizing advanced GPS and drone-based spatial technologies.

• Construction Staking and Monitoring

  Precision layout staking and structural monitoring services for civil contractors.

• ALTA/NSPS Surveys

  Detailed title surveys compliant with nationwide industry standards.

• Drone Surveys

  Aerial mapping and topographical data capture using unmanned aerial vehicles.

• As-built Surveys

  Post-construction validation surveys documenting constructed parameters.

• Boundary Surveys

  Property line determination and boundary mapping for commercial and private parcels.

• Topographic Surveys

  Detailed terrain mapping to support civil site planning.

Subsurface exploration and analytical soils reporting to guide structural foundation designs.

• Subsurface Soil Sampling

  In-situ drilling and physical sample collection for laboratory classification.

• Geotechnical Investigations and Reports

  Comprehensive soil mechanics reporting to establish bearing capacities and settlement risks.

Environmental risk assessment and compliance solutions supporting property transfers and local developments.

• Phase I Environmental Site Assessments

  Standardized environmental reviews to assess historical hazardous contamination risks.

Construction materials testing for quality programs in the field and laboratory.

• Concrete Testing

  Testing of concrete materials during active construction phases.

• Soils Testing

  Field and laboratory testing of soils for site and infrastructure work.

• Pavement Materials Testing

  Testing of pavement materials used in transportation and site construction.

Code-compliant third-party construction inspections of structural systems and earthworks.