A method of building a structure in the presence of water includes providing two or more three-sided elongated triangular bodies that has a first end, a second end, and an internal flow passage that extends between the first end and the second end. Each of the triangular bodies has an apex with a base opposed to the apex. Each of the triangular bodies is positioned in side by side relation, with the flow passage of one or more of the triangular bodies serving as a flow path for water. A road, a bridge or a dock is positioned transversely across the triangular bodies.