We have extensive experience designing cost-effective wind turbine foundations for the full spectrum of geotechnical conditions: from soft/buoyant conditions to competent bedrock. For the popular gravity base foundation, we have pioneered the industry shift from the octagonal shape with orthogonal top and bottom reinforcement to the more efficient circular shape with radial top and bottom reinforcement. We can advise our client relative to the most appropriate ground modification techniques to improve subgrade support for marginal sites.

The image below [Source: Ben-Hassine, J. (2018). Direct Reliability Based Design of Shallow Wind Turbine Foundations. PhD Thesis. Colorado School of Mines, Golden.] illustrates contact pressure distribution under wind turbine foundations for different subgrade conditions. As can be noted, while a triangular pressure distribution might me appropriate for soft subgrades, it deviates significantly from that assumption for hard subgrades. Contact pressure is a direct input to the flexural design of the concrete foundation and such input is best obtained through finite element analysis with correct loads and boundary conditions. Our detailed design always employs such sophisticated tools.


Are you an Owner/Investor looking for the peace of mind that comes from the review of your project by an experienced set of eyes? Are you a Designer looking for the validation of your design that comes from a peer review? Either way, we will be glad to put our knowledge and experience at your disposal. We have extensive technical know-how, thorough knowledge of design standards and decades of construction field experience. The cost of a technical review is often negligible compared to the benefits that it brings. 

We are able to serve as Engineer-of-Record on projects in many US and Canadian jurisdictions provided that our scope involves sufficient design involvement and oversight. We are licensed to practice Engineering in the following US states and Canadian provinces:

  • US States:
    • California
    • Colorado
    • Florida
    • Illinois
    • Iowa
    • Kansas
    • Maine
    • Michigan
    • New Mexico
    • New York
    • North Carolina
    • Oregon
    • Pennsylvania
    • South Carolina
    • Texas
    • Washington
    • West Virginia
    • Wisconsin
    • Wyoming
  • Canadian Provinces:
    • Ontario
    • Quebec
    • Saskatchewan 

With over 30 years in engineering design and construction, we have accumulated extensive North American and global experience in multiple civil engineering disciplines:

  • Geotechnical engineering and geohazard assessment & mitigation
  • Foundation design - all types and for all structures
  • Structural engineering - analysis & design
  • Concrete design
  • Soil-structure interaction
  • Slope stability and earth retainment
  • Earthwork and roads
  • Construction methods

Contact pressure under extreme loads