Abstract: A precast concrete soil retaining structure is provided comprising an upright portion, a base portion, and a plurality of retaining caps. Preferably its use will be as a wingwall for use with culvert systems. The upright portion of the structure has a first face and a second face, as well as a first end and a second end. The first end is of a height greater than or equal to the height of the second end. The base portion has a top surface and a bottom surface and a plurality of channels of a first diameter, each of which extends between the top surface and the bottom surface. Each of the retaining caps has a channel of a second diameter extending therethrough, with the second diameter preferably being less than that of the first diameter. Each of the retaining caps is positioned above a respective one of the base portion channels.