What was the length of the center span of the bridge and how was that significant in the world of bridge building records at the time of construction?

Hello. Your question is incomplete and more context is needed so that it can be answered satisfactorily. Because of the lack of context it is not possible for me to tell you how long it was in the center span of the source, however, for that length to be so significant in the world of bridge construction records, it means that it was a bold length and not accomplished so far. The execution of this length was a breakthrough in the branch of bridge construction, being a mark of engineering and something very difficult to be accomplished.

a woodchuck would chuck 12.5 wood : 3