Upper Twin Falls Bridge
... that the Upper Twin Falls Bridge was built to replace a previous span that would have been flooded upon completion of a dam downstream?
... that the <b id="mwBuE"><a href="./Upper_Twin_Falls_Bridge" id="mwBuI" rel="mw:WikiLink" title="Upper Twin Falls Bridge">Upper Twin Falls Bridge</a></b> was built to replace a previous span that would have been flooded upon completion of a dam downstream?