help with rail in Illinois

[FCVPI99]

i know it has nothnig to do with radio but....

what im doing is looking a old 1940 airal photos of Illinois and finding all the roundhouse/turntables and marking them in google earth

The Fallowing i need yard names
County Town
Bureau County Bureau Junction
Cook County Des Plains
Douglas County Villa Grove
Jackson County Carbondale
Kane County Aurora X 2
Kane County Elgin
Kankakee County Kankakee X 2
Lake County Waukegan X 2
Madison County Madison
Madison County Venice
McHenry County Harvard
McHenry County Crystal Lake
Marion County Centralia
Marion County Central City
Knox County Galesburg X 3
St Clair County East St Louis X 4
St Clair Coutny Brooklyn
St Clair County Sauget
Sangamon County Springfield
Winnebago Coutny Rockford X 2

ones marked with X # means there are that many in the town


if you have google earth please search for roundhouses 4.5 and take a look