C.P. & St.L. diamond with the Wabash just west of this bridge. The C.P. & St. L. was abandoned in 1925 per the referenced document here. C&NW decided to build over the top of both railroads.
https://www.labellemodels.com/manuals/Chicago,%20Springfield...
This bridge is over the Norfolk Southern Railway not the KCS. The CNW crosses the KCS approx 3/4 mile south of this bridge.
here is a plan view of the viaduct and the diamond to the west.