Macombs Dam Bridge
... that the swing span of Macombs Dam Bridge was considered the world's heaviest movable mass at the time of its construction?
... that the swing span of <b id="mwAiU"><a href="./Macombs_Dam_Bridge" id="mwAiY" rel="mw:WikiLink" title="Macombs Dam Bridge">Macombs Dam Bridge</a></b> was considered the world's heaviest movable mass at the time of its construction?