The late Floyd Carpenter identified the first trestle as being Knights. I had presumed that the burned trestle was from the same time period, but one of the few surviving SVRy train sheets shows locomotive #50 trapped at the Prairie City end. As this was later than 1914, either the trestle is wrong or it burned more than once.
I have not made an inventory of all of the curved trestles on the SV, but there were at least three. The one at Johnson's Jumpoff was filled in but the others (that I know of) lasted until the line was abandoned.