Photograph of a group of three men constructing a waterways model, showing one man in an elevated box, ca.1925. In the background on the left, a man is seen standing near a small crank and pulley system at the perimeter of a large waterways model. The crank and pulleys are attached to a long metallic crane arm that supports a large rectangular, wooden platform with rails at its end. The platform hangs high above the waterways system, and a man is seen standing atop the platform looking at the model below. Water is seen moving through various channels of the model against small cement ridges. Near the water channel on the right, another man stares at the flow of the water. Two small gates are also visible within this channel. To the right of the men, piles of wood and other materials lie in a large heap. In the background, a large building with numerous windows can be seen. In the small doorway of the building at center, a man can be seen looking in the direction of the model.