US 31–Pentwater River Bridge
... that the US 31–Pentwater River Bridge could not have been built prior to the 1930s because manufacturing techniques could produce a span no longer than 45 feet (14 m)?
... that the <b id="mwCrw"><a href="./US_31–Pentwater_River_Bridge" id="mwCr0" rel="mw:WikiLink" title="US 31–Pentwater River Bridge">US 31–Pentwater River Bridge</a></b> could not have been built prior to the 1930s because manufacturing techniques could produce a span no longer than <span about="#mwt40" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"45"},"2":{"wt":"ft"},"3":{"wt":"m"}},"i":0}}]}' id="mwCr4" typeof="mw:Transclusion">45 feet (14</span><span about="#mwt40" typeof="mw:Entity"> </span><span about="#mwt40">m)</span>?