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- East bound traffic analysis of vehicles crossing the Superior Viaduct and Central Viaduct on October 15 and 16, 1909. The data was collected by the High-Level Bridge Commission during its study of possible alternative bridge routes for a new high-level bridge to replace the Superior Viaduct., This image is featured in the 100th Anniversary of the Detroit Superior High Level Bridge digital exhibit.
- Cover of King Iron Bridge & Manufacturing Company of Cleveland, Ohio, catalog. King Iron Bridge & Manufacturing Company was the principal contractor for the construction of the Detroit-Superior High-Level Bridge., This image is featured in the 100th Anniversary of the Detroit Superior High Level Bridge digital exhibit.
- Example of bridge type constructed by King Iron Bridge & Manufacturing Company, of Cleveland, Ohio. The King Iron Bridge & Manufacturing Company was the principal contractor for the construction of the Detroit-Superior High-Level Bridge., This image is featured in the 100th Anniversary of the Detroit Superior High Level Bridge digital exhibit.
- Map of Franklin-Superior High Level Bridge Route together with proposed change in alignment of Easterly end of Superior Ave. Viaduct in comparison with Lorain-Huron High Level Bridge Route, created by J.B. Davis & Son, Civil Engineers, Cleveland, Ohio, Feb. 8, 1906, This image is featured in the 100th Anniversary of the Detroit Superior High Level Bridge digital exhibit.
- Drawing of the proposed Detroit-Superior High-Level Bridge, by F.H. Norton. The bridge was designed by Cuyahoga County engineers, Frank R. Lander, Alfred M. Felgate, William A. Stinchcomb, and Albert W. Zesiger., This image is featured in the 100th Anniversary of the Detroit Superior High Level Bridge digital exhibit.