Posted January 24, 2019, by John Marvig (marvigj27 [at] gmail [dot] com)
While attempting (unsuccessfully) to find information about the numerous girders along this route, I found that this bridge (Denison) was not in place in 1944. However, it was in place in 1973, and the substructures were dated 1948. About 50 miles west, I came across a bridge with similar dimensions that was replaced in 1947 (Ascot). It seems that Ascot is the most likely location it could have originally been constructed. I have attached the 1944 and 1973 track charts for each bridge. My question about the truss is, would it have been possible for the truss to be shortened by two feet upon relocation?
Also, I cannot be certain that this was the original location of the approach girders. Several crossings of the Boyer River were filled in around the same time, and there are a few other 45' through girders that were relocated through the 40s, 50s and 60s along the route with identical structural details. This route was constructed between 1899 and 1900.
While attempting (unsuccessfully) to find information about the numerous girders along this route, I found that this bridge (Denison) was not in place in 1944. However, it was in place in 1973, and the substructures were dated 1948. About 50 miles west, I came across a bridge with similar dimensions that was replaced in 1947 (Ascot). It seems that Ascot is the most likely location it could have originally been constructed. I have attached the 1944 and 1973 track charts for each bridge. My question about the truss is, would it have been possible for the truss to be shortened by two feet upon relocation?
Also, I cannot be certain that this was the original location of the approach girders. Several crossings of the Boyer River were filled in around the same time, and there are a few other 45' through girders that were relocated through the 40s, 50s and 60s along the route with identical structural details. This route was constructed between 1899 and 1900.