A boulder wall is a style of retaining wall that is commonly used on civil and sub-division projects. A boulder wall uses carefully places rocks and boulders to create a stacked wall capable of retaining fill. When used for civil and sub-divisions, the walls are engineered to meet the lifelong demands of the location they are being installed. This generally includes a footing along the base where the lowest level of boulders are anchored into the ground. Boulder walls can be a very cost effective solution to a retaining wall particularly where there a boulders won from on site locations. Alternatively, the wall can be a high-spec product constructed of sandstone blocks creating a beautiful final product.