{"nrhp_refnum":"02000701","name":"West Orange Road-Thomas Bridge","other_names":["Orange Road Bridge","Thomas Road Bridge","2132184","Del-15-15"],"category":"structure","location":{"address":"OH 114, E of jct. with OH 315","address_restricted":false,"city":"Powell","county":"Delaware County","state":"OH","lat":40.175271088000045,"lon":-83.04555979199995,"geom_source":"nps_gis"},"listed_date":"2002-06-26","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"A steel, nine-panel, pin-connected Pratt through truss bridge carrying Township Road 114 (West Orange Road) over the Olentangy River near Powell in Liberty Township, Delaware County, Ohio. It was built in 1898 by the Toledo Bridge Company.","why_significant":"The bridge is significant under Criterion C for engineering as a surviving example of the metal through truss type that once dominated highway bridge design. It is the work of the Toledo Bridge Company and county deputy engineer John B. Taggart, whose design for high abutments and a lower chord that handles stress reversals helped it survive the 1913 flood. It is one of only two ODOT-identified Pratt through truss bridges by the company still standing.","narrative":"Carrying West Orange Road over the Olentangy River in Delaware County, Ohio, this steel Pratt through truss bridge was built in 1898 by the Toledo Bridge Company. It is 182 feet long, with a 180-foot clear span, a 16-foot roadway and trusses 27 feet high, resting on sandstone abutments. The county commissioners ordered it after floods destroyed or damaged the earlier wooden Thomas Bridge at the site. Deputy engineer John B. Taggart designed tall abutments to lift the structure above the broad floodplain, and a lower chord reinforced with latticework to handle stress reversals. Those features helped it survive the great 1913 flood. Pin-connected Pratt trusses were once the standard highway bridge in Ohio, but surviving examples dropped from 510 in 1983 to 168 in 2001. The Ohio Department of Transportation counts this bridge among eleven it considers eligible for national listing. A 1970 rehabilitation was judged routine maintenance, and the bridge still carries traffic.","period_of_significance":"1898-1950","architect_builder":"Toledo Bridge Company","architectural_style":"Other: Pratt through truss","criteria":["C"],"status_note":"Still in use as a road bridge. A 1970 rehabilitation replaced stringers and bridge seats, and the structure was described in 2001 as in good condition apart from a rusted guardrail panel.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:52:06.885664-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/02000701.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/02000701/97edf71974-800.webp","url_1600":"https://nationalhistoricalregister.com/media/02000701/97edf71974-1600.webp","licence":"CC BY-SA 3.0","author":"Wdzinc","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:West_Orange_Road-Thomas_Bridge.jpg\" rel=\"noopener\">Wdzinc</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:West_Orange_Road-Thomas_Bridge.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71988088","wikipedia":"https://en.wikipedia.org/wiki/West_Orange_Road-Thomas_Bridge","wikidata":"https://www.wikidata.org/wiki/Q7986123"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/delaware-county/west-orange-road-thomas-bridge-02000701/"}