You can read about this sturdy, 1894 Pencoyd Bridge & Construction Co. (PA) trestle over the Levisa Branch in Kentucky right here.  It once carried two tracks, maybe when it was over the Ohio River.  The website I noted above says that this bridge is closed to all traffic, but check the rails…they’ve been used recently.  The actual maker plate is on the right support.  It’s been broken, but it’s still readable.