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The long line running west along the south side of the dam went to United Concrete Pipe, which had a six-wheel Plymouth "critter" to switch cars to the ex-PE line that is still in service. The line running east along Gladstone served, among other customers, Orban Lumber, which moved from Pasadena when the 210/710 stub freeway took out their yard and the UP branch that served it. Orban was special to truck fans for their fleet of classic Autocar Diesel lumber trucks. This area is very familiar, because I went to the Edison substation on the corner of Gladstone and Irwindale as part of my comm tech work.