This primary source comes from the Records of the Environmental Protection Agency.
National Archives Identifier:
556200Full Citation: Wabash Street Bridge Over the Chicago River in the City, One of More than Eight Drawbridges Crossing the River in the City Limits a Ship has Just Passed Under the Upraised Structure; 10/1973; Records of the Environmental Protection Agency, Record Group 412. [Online Version, https://www.docsteach.org/documents/document/wabash-street-bridge-over-the-chicago-river-in-the-city-one-of-more-than-eight-drawbridges-crossing-the-river-in-the-city-limits-a-ship-has-just-passed-under-the-upraised-structure, April 20, 2025]