Local 520 of the International Union of Operating Engineers came into existence in 1933. The geographical area of Local 520 includes the counties of Bond, Calhoun, Clinton, Fayette, Greene, Jefferson, Jersey, Macoupin, Madison, Marion, Monroe, Montgomery, Perry, Randolph, St. Clair and Washington. In earlier years, before merger, they were the jurisdiction of several different locals, some of which were located in Granite City, Alton, East St. Louis and Belleville to mention a few. Some of these locals were stationary and some were hoisting and a few were a combination of the two. All of these Locals eventually merged with what was then Local 315 in St. Louis MO. With this merger Local 315 became Local 513.