Browse Items (1 total) Tags: Office Building Browse All Browse by Tag Search Items Sort by: TitleCreatorDate Added Photos of Illinois Power Co. Transmission Substation and the Illinois Power Co. office building. Photograph of the Illinois Power Co. Substation. Photo of the Illinois Power Co. office building on E. Main St., Decatur, IL. Tags: Buildings, Business, Decatur IL., E. Main St., Illinois Power Co., Noel C. Dicks, Office Building, Photo File: Business, Power Company, Substation Featured Item Photograph of a Carl Sandburg Poem with Matching Article Photograph of a Carl Sandburg poem about Decatur and an article about the Poem taken in October of 2002.