Earth Retention Systems

Summit Geoengineering Services has performed designs and prepared construction drawings for over 1.2 million square feet of temporary and permanent earth retention systems (retaining walls) since we began offering this service in the mid-1990s.

Geotechnical and Structural Expertise Combined
SGS’s geotechnical expertise is critical for assessing subsurface conditions (i.e., foundation soil properties, groundwater effects, etc.) and performing global stability analyses in soft soil conditions. We utilize our structural expertise to evaluate the soil structure interaction and to design structural components of unique walls. We also provide clients with suggestions based on our expertise and experience on wall types, site grading alterations/improvements, and the need for further explorations to collect additional geotechnical data for the wall design of global slope stability.

Delivered Services
SGG’s earth retention design services include full contractor shop drawing submittals, responses to engineer reviews, and preliminary quantity estimates. Our geotechnical specialization allows us to evaluate wall construction sites for global stability, and if deemed prudent or required by project specifications, to perform global slope stability analyses. IAdditionally, our geotechnical expertise enables us to interpret subsurface data from our own explorations or geotechnical reports/exploration logs prepared by others.

Construction Inspection
We have inspected the construction of many of the walls that we have designed. We also have been retained to investigate wall failures as an independent consultant. For our designs, we utilize NCMA and AASHTO LRFD methodologies. We have developed product specific design programs using Mathcad and Excel spreadsheets.

Wall Products

Small Retaining Wall Products


Temporary Walls

Tensar SierraScape
Soldier pile and lagging
Steel sheet piles

Large Precast Block Products

CastleWall MSE
CastleWall Gravity
Stone Strong
London Boulder
Big Block

Geogrid Products

Huesker Fortrac
Carthage Mills Raugrid


Rockery Walls
Cast-in-place Concrete