When the amount of material behind the wall becomes too great, it is necessary to properly anchor the wall to keep it from being pushed out.
Straight Retaining Wall
Concrete Retaining Wall Gallery
Sometimes we need to build a retaining wall that will help increase a home owners backyard. In this case a simple straight retaining wall did just the trick. Had the owner used landscaping blocks, it would just be a matter of time before the hillside started pushing the blocks out of position.