Our team will work with yours to determine the best solution for your project. Bring us your soils investigation & construction plans and we will evaluate for cost, schedule and design. Aggregate Piers may be a viable option saving you time and money even if not recommended in the geotechnical report.

Engineered Design

Aggregate pier design is dictated by the foundation plan, loading, and site soil profile. A geotechnical report, foundation plan, and civil drawings (or relative rough subgrade elevations) is enough information to put together a preliminary design and deliver a proposal. We can even work from a napkin sketch for budgets.


Aggregate Piers will be installed according to a signed and stamped engineered design tailored to your structure and soil conditions. Design will be validated through modulus testing, the requirements of which are dictated on a per project basis. Additionally, our rigs are equipped with tracking systems that monitor the depth, pressure, and duration of each pier installed. All of this is added assurance that the Aggregate Piers perform per the design requirements.


    The Subgrade Solutions' team has over 20 years combined underground construction and excavation experience. Our engineering team brings over 30 years of ground improvement design experience, designing and working with soil profiles from around the globe. Let us put our knowledge and experience to work for you!

    Contact us

    Chicago, IL, Headquarters

    Mike Diederich

    (708) 582-2000

    St. Louis, MO, Regional Office

    Tim Distler, Vice President

    (314) 501-4575