This is actually Bunk House trestle on the Fort Leonard Wood Branch. There's a number of interesting bridges and trestles on the branch, some are a little harder to get to than others. Some where replaced with thru girders in the early 1980s.
Brad, I've read in Frisco Power how one of the old refurbished 2-10-2s kicked the track out at the end of a curved trestle around 1943 and had a short "sit-down strike" until they could get her back on the rails. Now I bet THAT would have made for some interesting pictures! 8^)