Photo taken by Panoramio user JBTHEMILKER
License: Creative Commons Attribution-NoDerivs (CC BY-ND)
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BH Photo #337775
According to 1992 NBI, the previous bridge here was a 1917 Concrete through arch (ie a historic rainbow arch bridge) so I would assume this modern steel arch (a non-traditional bridge type for such a small stream) was some form of mitigation for demolition of the historic rainbow arch.