Abstract: A building component for a noise barrier retaining wall which is structurally suitable for retaining materials such as earth or wind. The building component is formed to assist in the construction of the noise barrier retaining wall, and more specifically, to support and position the wall's reinforcing posts during the construction of the wall, such that the reinforcing posts can be permanently set in suitable footings after the wall has been erected. Such a method is in contrast to prior art approaches which require that such reinforcing posts be permanently and accurately in place prior to construction of the wall. Accordingly, the time, labor and costs involved in the construction of the wall are reduced, allowing for a more economical retaining wall, while retaining the structural components necessary to ensure a properly aligned and plumb wall that exhibits suitable strength and stability.