Several people have asked Grampy for a schematic of his magnificent layout, but he hasn’t had time to make one yet.
Based on an attempted analysis of the images he has presented (see the link from his signature: http://s297.photobucket.com/albums/mm237/GrampysTrains/), I have attempted to deduce from the photos the eastern part of his track plan, from east staging to the yard/big city scene:

Some of this stuff is based on conjecture, since I haven’t seen the layout in person.
I am more hazy on what the west end of the layout looks like - from the yard to west staging.
Grampy - feel free to correct me/clarify, and I will post a corrected drawing.
Stein
Actually - maybe not - this picture must show the very western end of the layout, and one can see the city module in the background:

And Grampy has mentioned that it is single track from the yard to west staging. So I guess the two mainline tracks merge to one west of the yard, maybe after a crossover.
Also - the picture below must be from the far eastern end of the layout - we see Stoney Creek Town on the left:

Which means that there is a siding going to the mine between east staging and stoney creek.
Smile,
Stein
Is there no interchange between the Reading and the Pennsylvania?
Mark
Stein
Great job, thank you for the effort.
GS
You are right - Grampy would have put in an interchange.
Found it - it wasn’t in his picture gallery, but was in a sketch in a thread about yard design (http://cs.trains.com/forums/1490163/ShowPost.aspx)
Updated schematic (also added the yard lead/drill track and some tracks for a mine near the east end of the layout):

There is probably still some stuff missing along the part labelled “single track mainline”.
Smile,
Stein
Hmmm - that simplified things a bit again, yes 
How’s this ? :

You got a mine at the west end of the Reading, right ?
Stein
Hi Stein: You are a genius, my friend. That is just great! As to the mine, yes, it is at the West end of the Reading Line. BTW, the other end of the Reading Line ends in 4 track staging. I’m actually currently working on that. It was in a spot that was just too uncomfortable to get to. So I’m moving it out and away from the wall to make it more accessable. Doing track plans is an art in itself. My hat’s off to you! Thanks again for taking the time to do this. I really appreciate it.