Already done - its called the Kersh (peach) bridge the largest bridge ever built by Russia.
A nice bridge, but if this is the biggest bridge ever built by Russia?? I sure is no Golden Gate or even Chesapeake Bay Bridge. I got the impression there is land to be crossed to get from Crimea to Russia, so I was thinking a supervised highway with checkpoints like the Turks are doing with ships carrying grain from Ukriane.