The original line between Grosmont and Beck Hole was opened in 1836 by the Whitby and Pickering Railway and was horse drawn. Steam came in 1845 when it was absorbed into the York and North Midland Railway.
The original line was closed in 1865 when a deviation was made to avoid the rope hauled incline at Beck Hole, although parts were later reused for summer services to Beck Hole and for goods.
Although the parapets are stone, the timbers in the river suggest the bridge itself was wooden.
Old Railway Bridge between Grosmont and Beck Hole
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maybe an iron bridge replaced an earlier wooden bridge?
I am sure this is easy to check, I will check my Library.
I know this is random but is there any scope to fish that piece of water?
I can’t see how deep it is from the pictures or whether its even deep or likely enough to hold fish.