IMRR/C&IM Bridge over Sangamon River

(Bridge Hunter; Satellite)

C&IM = Chicago & Illinois Midland
IMRR = Illinois & Midland RR, the successor shortline operator.

This view is another reminder that DOT replaces truss bridges with concrete slabs while the railroads maintain truss bridges.

Street View

The trees in the above photo hide that almost half of the bridge is over the flood plain.

Satellite

Larry Senalik Flickr via a Larry Senalick post

As expected, the highway bridge also had truss spans in 1939. (Thank goodness for the shadows, otherwise I could not see the trusses.)

1939 Aerial View from ILHAP, at photo resolution

Speaking of a flood plain, I noticed this a little further southeast of the main channel.

1939 Aerial View from ILHAP, at photo resolution

That caused me to zoom out. Below is the entire 1939 photo showing that the river did some serious meandering in this area. The white line along the farmer's fields made me wonder if that was a levee. Looking at a contemporary satellite image, it is obvious that there is a levee along this river and part of Tar Creek. I added the "weather" label to these notes because this area floods even if I don't have a photo of a flood.

1939 Aerial View from ILHAP, at photo resolution