What a coincidence; I'd been looking for a similar item but couldn't find anything close, so I kit-bashed the Cowlitz River draw-bridge (Longview-Kelso, WA) using pieces from the VNHRR (basic structure), CVP ( resized trestle tower and thru girder), and Konstanz-Villingen (resized small steel arch). I didn't know the Miami route has a draw-bridge, but just as well; don't really want to add another route just for a single object.
Cowlitz_DrawBridge_01.jpg
Screenshot_Inland Empire_46.10361--122.89433_15-32-18.jpg
Screenshot_Inland Empire_46.10299--122.89361_15-33-19.jpg
Screenshot_Inland Empire_46.10308--122.89338_15-35-09.jpg
Screenshot_Inland Empire_46.10364--122.89347_15-34-16.jpg
Hope that helps; Cheers!