(
Satellite, a very unconfident guess.)
If you look closely, one can see a slight curve in the tracks between State Street and the bridge. The depot photo must have been taken with a telephoto lens because the curve appears to bend more in the photo.
Fortunately, Illinois has been uploading additional aerial photos because the late 1930's aerial was very confusing. For one, the shadow of the long looking building in the southeast quadrant of State Street and the tracks doesn't make sense.
There is a long building there today.
No street view driver has done the streets of this town, but I did find this view of the long building. Why would you build a new building with that roofline?
It is a company that builds seed cleaning equipment and other agricultural machinery.