Bunker Hill and Bridge Posted on 2017-Sep-22 by adohertyh Two structures (ship and bridge) designed to cross water, though over very different length scales. The two-centuries-old advances in metallurgy that allow for steel production at this huge scale still amazes me. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Like this:Like Loading...