Photograph of group of trucks outside Long Beach bunker of Consolidated Rock Products Company, April 1929. At center, a group of three trucks can be seen near the base of a large building. One man can be seen driving each of the loaded trucks. The rear compartment of each truck has been filled with gravel. Five large entrances can be seen near the base of the building, and several support beams line the outside walls. A large stairwell is seen to the left of the building, and several more can be seen near the top of the structure. At the upper-left portion of the image, five lights are seen hanging over the front of a large sign. In the extreme background to the left, metallic towers and trees can be seen.