can't edit again, but here are the coordinates for the abandon Birch Creek (Osage/Midland Valley) Railroad
Bridge.
N36.53718, W96.15561
Good job Anon, I shouldn't have missed a nameplate.
I visited this bridge last weekend. It has a plaque stating that it was built in 1905 by the Pennsylvania Steel Co, Steelton, PA. I wonder if the other Midland Valley RR bridges are of similar vintage?