A retaining wall holds back earth to prevent the force of gravity from pulling it down a slope into a area that by necessity must have a level grade. We might, at face value, incorrectly assume that such a structure is not needed on the Houston landscape. After all, the Gulf Coast is one of the flattest areas in the world. It has no mountains or valleys, nor even so much as a rolling hill. Why, then, would we need retaining wall in our part of the world?
The simple answer to this question is that terrain here only appears perfectly flat. A closer inspection reveals that there are dips and depressions in every lot, and many homes built along Buffalo Bayou have back yards with very steep grades that follow the watershed down to the stream.
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