Critical to our communities, water and wastewater systems often need to be upgraded, expanded, or rehabilitated to meet current and future demands and new regulatory requirements. Whether it’s pipelines, treatment plants, water storage, or flood control, Schnabel’s expertise in geotechnical engineering and hydraulic modeling provides for innovative and cost-saving solutions.

Upgrading or expanding water/wastewater infrastructure demands innovative and timely engineering services and solutions. Whether working directly with owners or with designers on design and design-build teams, we provide solutions from hydraulic analyses and geotechnical design through construction support. Clients rely on us for our ability to evaluate baseline data, consider value-oriented solutions, and provide prompt deliverables.

At the heart of our work is a diversely talented group of professionals dedicated to serving our clients and communities. We provide world-class expertise in water, wastewater, dams and levees, tunnels, and geotechnics/geostructural services. We also have advanced hydraulic modeling capabilities in-house, including 3D computational fluid dynamics, which can be a powerful design and optimization tool for water systems.

Hydraulic Analyses and Design

  • 1D, 2D, and 3D modeling
  • Computational fluid dynamics (CFD) modeling
  • Capacity and bottleneck studies
  • Hydraulic analyses and design
  • Maintenance of plant operations (MOPO) during construction
  • Outfall design and dilution modeling


  • Corrosion testing and design
  • Slope stability evaluations and design
  • Seismic evaluations/classifications
  • Underpinning and foundation VE
  • Dewatering designs
  • Geophysical investigations
  • Pavement design
  • Compaction testing
  • Risk register reporting
  • Instrumentation
  • Vibration monitoring
  • Excavation sequencing

Tunnels and Shafts

  • Tunnel and shaft design
  • Geotechnics
  • Ground improvement design
  • Constructability review and cost estimates
  • Trenchless evaluation and design
  • Preparation of contract bid documents
  • Blast design and plans
  • Support of excavation design
  • Qualitative and quantitative risk analysis

Key Contacts

George R. Teetes, PhD, PE

Principal / Tunnels and Underground
Board of Directors

James E. Parkes, PE

Principal / Tunnels and Underground