The new drone video posted on Inside EV's shows the new "tent" and gave me good shots of the railyard.
Check Out A Flyover Of The Tesla 'Tent' And Fremont Factory
Around 2:13 in the Video is a shot at the end of the test track. just off to the side was the original rail that supplied parts to the plant. That line looks like it is washed out next to the test track and wont work. There not rebuilding anything there.
The wye rail lead next to the car storage lot has been cut at the crossing and rail was removed. The switch serving the Wye is also gone. I honestly can't tell if they removed the rail at the road crossing or just buried it. However given the pad they look like there building another Tent or building I would not think the rail is there anymore. The April drone video I saw what appeared to be a rail pile next to the road. that is gone now. So I would have to say the existing rail service to the plant is done, and would require a total rebuild. But could it be in the works over in the new section who knows.
From a logistics standpoint Tesla should have rail service into the plant. Both for battery packs and and other incoming parts. Then the final car loading for outbound cars. Richmond must be a sweetheart deal to have to transfer all the cars up there.
In the video you can see two ramps for forklift to run up and get something heavy out of the tractor trailers. Battery packs? Drive assemblies? That could be railed in much larger bulk. Funny note, as the drone pulls away you can see auto rail cars leaving the RR yard heading right to left.
I also see the "augkuo Lot" has expanded. Now his last batch of pictures makes more sense.