Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ Nineteenth-Century Metal Arch Bridges https://trid.trb.org/View/1125032 Mon, 30 Jan 2012 07:08:53 GMT https://trid.trb.org/View/1125032 DUNLAP'S CREEK BRIDGE: ENDURING SYMBOL OF AMERICAN ENDEAVOR https://trid.trb.org/View/308498 Sat, 30 Jun 1990 00:00:00 GMT https://trid.trb.org/View/308498 DUNLAP'S CREEK BRIDGE--ENDURING SYMBOL OF AMERICAN ENDEAVOR https://trid.trb.org/View/301691 Tue, 31 Oct 1989 00:00:00 GMT https://trid.trb.org/View/301691 DUNLAP'S CREEK BRIDGE. ENDURING SYMBOL OF AMERICAN ENDEAVOR https://trid.trb.org/View/295806 Wed, 31 May 1989 00:00:00 GMT https://trid.trb.org/View/295806