On December 22, 1898, Plumbers, Gasfitters, Steamfitters, and Steamfitters Helpers requested a charter be issued by the United Association. On January 1, 1899, the United Association granted Local 57 a charter.
On April 5, 1902, Local Union 328 Plumbers, Steamfitters, and Gas Fitters was chartered in Freeport, IL.
In 1915 thirteen members of Local Union 57 petitioned the United Association to form a separate Steamfitters and Steamfitters Helpers Local. On September 25, 1915, Local Union 210 was chartered. September 1, 1948, Local Union 57 and 210 merged to form Local Union 23, Rockford, IL.
On January 1, 1970, Local Union 328, Freeport, IL merged with Local Union 23, Rockford, IL. Joe Gillespie was the Business Representative for Local Union 328 when the merger took place.