<p><b>The fascinating history of the St. Louis Bridge, the first steel structure in the world.</b></p><p>In <i>Spanning the Gilded Age, </i>John K. Brown tells the daring, improbable story of the construction of the St. Louis Bridge, known popularly as the Eads Bridge. Completed in 1874, it was the first structure of any kind¿anywhere in the world¿built of steel. This history details the origins, design, construction, and enduring impact of a unique feat of engineering, and it illustrates how Americans built their urban infrastructure during the nineteenth century. </p><p>With three graceful arches spanning the Mississippi River, the Eads Bridge''s twin decks carried a broad boulevard above a dual-track railroad. To place its stone piers on bedrock, engineer James Eads pioneered daring innovations that allowed excavators to work one hundred feet beneath the river. With construction scarcely begun, Eads circulated a prospectus¿offering a 500 percent return on investment¿that attracted w