Dallas Texas Concrete builds the footers or the foundations upon which stone or brick retaining walls are built.  This is done by trenching or digging a support beam similar to that of a house foundation slab.  Usually there are steel rods coming out of the concrete support beam that the builder of the wall will tie in to.

Another type of wall is a solid concrete wall, sometimes called “wing walls”.  This is done by using specialized forms with interlocking steel clasps.  The retaining walls are usually 1 ft thick and may be as high as 10 ft.
 

The picture is the basement level of what is to be a 7,000 sq ft home that is constructed of solid poured concrete walls. The poured concrete walls are 10 ft high and 1 ft wide.  The outside walls are the “wing walls” that start at 10 ft and taper to about 4 ft high.  There are specific precautions to prevent water seepage and mold including “French drains” along the outside-bottom of the basement walls.  These walls are all supported by steel reinforced concrete piers that are 1 ft in diameter and 18 ft in depth.