Photograph of a steam engine hauling rock for the construction of the San Pedro breakwater, ca.1899. A locomotive engine stands at center, billowing steam, connected to a line of cargo palates loaded with rock. To the engine's left, a tank for holding liquid stands on the tracks with a warning that reads "This Tank is Fitted with Heated Pipes". Steps lead down the hill which is partially visible at the right; several women come down the furthest steps, while one stands at the bottom of the steps in the foreground, dressed in light-colored clothing. The masts of ships can be seen in the background. Picture file card reads "Looking northerly up the main channel from a poin which, in 1945, would correspond to berth 81 or 82.".