Wheeling Tunnel
... that over 13,000 square feet (1,200 m2) of German-made tile lines the interior of the Wheeling Tunnel?
... that over <span about="#mwt87" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"13,000"},"2":{"wt":"sqft"}},"i":0}}]}' id="mwF1I" typeof="mw:Transclusion">13,000 square feet (1,200</span><span about="#mwt87" typeof="mw:Entity"> </span><span about="#mwt87">m</span><sup about="#mwt87">2</sup><span about="#mwt87">)</span> of German-made tile lines the interior of the <b id="mwF1M"><a href="./Wheeling_Tunnel" id="mwF1Q" rel="mw:WikiLink" title="Wheeling Tunnel">Wheeling Tunnel</a></b>?