The Omaha Structural Steel Works was a company also known as Omaha Steel Works and as Omaha Structural Steel Bridge Co.in Omaha, Nebraska A number of its works are listed in the U.S. National Register of Historic Places. Works include (with variations in attribution): * AJX Bridge over South Fork and Powder River, I-25 W. Service Rd. (old hwy 87), Kaycee, Wyoming (Omaha Steel Works), NRHP-listed * , US 30 over the Loup R., Columbus, Nebraska (Omaha Steel Works), NRHP-listed * Lake Zumbro Hydroelectric Generating Plant, off Co. Hwy. 21 at N end of Lake Zumbro, Mazeppa Township, Mazeppa, Minnesota (Omaha Structural Steel Bridge Co.), NRHP-listed * , Main St. over W. Papillion Cr., Elkhorn, Nebraska (Omaha Structural Steel Works), NRHP-listed * Ocean to Ocean Bridge, Penitentiary Ave, Yuma, Arizona (Omaha Structural Steel Works), NRHP-listed * Plattsmouth Bridge, US 34 over the Missouri R., Pacific Junction, Iowa and Plattsmouth, Nebraska (Omaha Structural Steel Works), NRHP-listed * , NE 281 over the Republican R., 2 mi. S of Red Cloud, Red Cloud, Nebraska (Omaha Steel Works), NRHP-listed * , 4.4 mi. SE of Joseph City on Joseph City-Holbrook Rd., Joseph City, Arizona (Omaha Structural Steel Works), NRHP-listed * , 4 mi. S of Woodruff on Woodruff-Snowflake Rd., Woodruff, Arizona (Omaha Structural Steel Works), NRHP-listed (en)