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Native Stone Walls are the Best Choice |
 Wooden railroad cross tie walls are slightly less expensive initially than a stone retaining wall, but their useful life is only approximately ten years. In addition, many cities will not permit wooden tie walls due to their lack of structural integrity and the existence of harmful chemicals, such as creosote. |
 Pre-cast concrete block walls are typically more expensive than natural stone. The manufacturer determines the design and look of the product. Spacing and landscaping constraints can also become issues with the modular block walls. This type of wall retains grade through the use of a geogrid "tie back" system. If the wall is ten feet tall, then ten feet of soil behind the wall must be excavated. This is a substantial amount of displaced soil, which in certain cases must be hauled off site and replaced with structural fill. Finally, the entire excavated area must be compacted and tested between layers of the geogrid. All of these processes are time consuming and expensive. |
 Cast-in-place concrete walls are predictable from an engineering standpoint. They are available across the United States, but they are expensive and the stark appearance make this alternative an unattractive solution. The time required for construction, which exceeds that of a pre-cast block wall, generally makes the cast-in-place concrete wall simply not a practical solution. |
 Concrete sack walls are a revetment system. Although they are typically less expensive than a structural stone wall, they not designed by an engineer and, from a visual standpoint, not particularly pleasing. |
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