OK,
Took the latest info into account. main track height 35". Elevation to 43". Allow for roadbed and track height of 1" to bottom of elevated track support = 7" for Hi-Cubes and Auto-Racks.
Elevated from East access bridge to alcove along North wall and to midway on West wall.
Access aisle in West is 24"-28". Maybe you want a hatch or two instead. Lost a lot of real estate.
Corrected rise in steps and added back. Track comes out 5th step from top. Will the clearance be ok?
The mains are 0106 outer and 096 inner with 5" center to center rail spacing. Should be good.
The rest of the plan will come later if you like the mains. Issue with the turnback would be that a switch will be needed where elevation is declining at the East from the North alcove. That's the reason I elevated the run past the stairs and alcove loop back, too avoid that issue.
The turnback switch in the South would be before the stairs and stay on the table and curve up to mid-point in the East for the other switch. Crossing the open area would be a physical blockage and a construction issue on top of running into the elevation.
You need to keep in mind how large this is and that the loops are sweeping. They're not even close to something like and lot of 048\054 that you've seen or may have in mind.
I need the exact location of the water meter obstruction indexed from the alcove edge to confirm track clearance.
What do you think? Are we getting there? photo and multiple view pdf attached
