Posted March 18, 2014, by Nathan Holth (form3 [at] historicbridges [dot] org)
Curious what the reasoning is for listing as a rigid-frame. I think this is likely a concrete arch. In terms of eyeballing (which can be risky with this bridge type) the shape of the arch is deeper than with a typical rigid-frame. Secondly, the bridge has a listed date of 1910 and the rigid-frame was not introduced in the the United States until 1922. The first bridge actually still stands... it surprisingly was not listed on BridgeHunter so I took the liberty of adding it.
Curious what the reasoning is for listing as a rigid-frame. I think this is likely a concrete arch. In terms of eyeballing (which can be risky with this bridge type) the shape of the arch is deeper than with a typical rigid-frame. Secondly, the bridge has a listed date of 1910 and the rigid-frame was not introduced in the the United States until 1922. The first bridge actually still stands... it surprisingly was not listed on BridgeHunter so I took the liberty of adding it.
http://bridgehunter.com/ny/westchester/pondfield-road/