Photo taken by David Backlin in June 2011
I believe this is the abandoned Burlington Northern (as of 1981) line which continued north along US 71 through Belton and into south KC. North of Grandview, MO the RoW has been covered and a couple of other bridges removed. I suspect this one bridge remains only because there wasn't steel worth removing. The bridge over this line on MO 7 east of Harrisonville was removed and the cut filled several years ago. This line continued east to East Lynne where the 1954 quad shows it as part of the Frisco system.