Photograph of aerial view of two men creating a model of waterways, ca.1925. Near the top of the image, two men are seen standing around the perimeter of a large model waterways system. Both men are dressed in very formal attire. The man on the left is seen grasping a large pole in his right hand as he watches the model. The man on the right grips a large valve handle attached to a steel pipe. Ridges of cement form small barriers and channels in the model. Near the center, water can be seen rushing through one of the channels. Two small gates are seen spread across the body of this channel. The gate consists of numerous vertical ridges attached to a horizontal beam. To the right, a large crane arm supports a rectangular cage hanging far above the model. To the far left, another man is seen gripping a valve handle on a large pipe. At the top of the image, two automobile are visible near a small tree. Patches of barred fence and solid wall enclose the men's workspace.