Envelope reads "Hetch Hetchy Mitchell tunnel explosion 7/18/30." Photograph shows a group of men standing and looking at something outside the frame of the picture. Their backs are to the camera. In the foreground a pile of cables and a bench resting on sawhorses can be seen. This photograph was printed in the Oakland Tribune on July 18, 1930 (p2) with the caption "Scene at shaft top as bodies were brought to the surface." For more information about the Mitchell Tunnel explosion see h99.1.482.