Prototype track layout for St. Louis yards/union station yard

I’m trying to find information on the prototype track layout on the yards in st. louis and union station. I’d like to find out the exact layout from around the 1940s so I can try to base my layout on that. I’ve done tons of searches and can not seem to find this information on the web. I did find some maps that showed a union pacific and missouri pacific yard. I don’t know if both of these existed in 1940. I have a good deal of room to work with so I was hoping to model both of these yards and the union station one.

You might try these folks:

http://library.wustl.edu/units/spec/archives/aslaa/directory/union-station.html

You may want to try the book in the below link. I plan on purchasing this book myself. I always enjoyed having a drink in the Grand Hall. It is hard walking through that structure today and pondering what once was. It is sort of ironic that the trainshed is a big parking lot now. I am assuming the Landry’s is still open there too.
http://www.arcadiapublishing.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=arcadia&Product_Code=0738519839&Product_Count=&Category_Code=

I bought that book a few weeks ago. It’s got some great pictures for modeling the interior and such and some pictures of the lines coming into/out of the station but I was looking for an exact layout of them. I’ll have to look into the wash u thing. That sounds promising. I did find a bunch of exact layouts of the chouteau yard yesterday. Here’s the link if anyone’s interested:

http://205.214.89.196/cgi-bin/discus/show.cgi?tpc=1&post=403