Overview
This bridge was found by chance while on a bridgehunting tour, as it can be seen from the Hwy. 151 Bridge. Since the bridge was fenced off from both ends and far away, the last option was to focus in on the span with the camera and take some shots from a nearby local road. From Google Earth, it appears that the bridge's flooring has long since been removed and the bridge is now nothing more than a truss structure.
Photo taken by Jason Smith
BH Photo #211882
You have to select Bertram township on the last two links.
Apparently it was a road from C.R. to Mt. Vernon, then on to the Mississippi at Clinton.
Blaine was the name of three or four property owners in the vicinity.
Some online atlases:
1895:
http://www.historicmapworks.com/Map/US/1602813/Bertram+Towns...
1930:
http://128.255.22.135/cdm/ref/collection/atlases/id/13157
1938:
Road is designated BB from C.R. to Mt. Vernon.
Mystery Bridge article as part of the tour through and around Bertram: http://thebridgehunter.areavoices.com/2014/07/13/mystery-bri...
Here's a newspapers.com page with an article with the history of the road's name.
https://www.newspapers.com/newspage/550964382/