Photograph of large apparatus of Rivas plant of the Union Rock Company, February 1927. At center, a large structure composed of wooden and metallic beams is visible. To the left of the structure, a large ramp composed of crossbeams is visible. At the center of the ramp, a wheeled mine cart can be seen moving down the ramp to the left. At the top of the ramp, a single person can be seen standing beneath a small roofed-structure. At center, a jumble of wooden beams and rails can be seen composing the main body of the apparatus. Near the center, a long ladder is visible connecting the base of the device to the platforms at its top. To the right, additional wooden poles stand near a group of utility poles. Further to the right, an obscured cylindrical object can be seen sitting on a railroad track. In the immediate foreground of the structure, a small building is visible beside a wooden-picket fence. Further in the foreground, a pair of railroad tracks are visible with shrubs and various types of vegetation growing on either side. In the extreme background, mountain ranges are visible.