this looks like the only train tracks close to where the USNS Mercy is moored.
and fits the description of the accident also
its 900 ft from the end of the track to the pier and the story said it was about 250 yds from the Mercy so not too close at all. probably didn't even make it under the thomas vincent bridge
looks like the engineer did a good thing drawing attention to what is going on down there, human trafficking.