One of the plant switchers at the Riverside Cement plant in Oro Grande, California, is Webb Asset Management (WAMX) GP35 3510. Built by EMD in April 1965 as Western Pacific 3014, it was later part of Union Pacific's roster (as their 793). UP sold it to Eastern Idaho Railroad, where it retained the UP number (793). EIRR sold it to WAMX, and it eventually found its way to the desert of southern California, as seen here.
