{"nrhp_refnum":"96001517","name":"State Highway 78 Bridge at the Red River","other_names":["Fn0279-02-024"],"category":"structure","location":{"address":"OK 78, across the Red River at the OK-TX state line","address_restricted":false,"city":"Ravenna","county":"Fannin County","state":"TX","lat":33.75301736100005,"lon":-96.19611279599997,"geom_source":"nps_gis"},"listed_date":"1996-12-20","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation","Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"A 2,108-foot steel truss highway bridge carrying State Highway 78 over the Red River at the Oklahoma state line near Ravenna, Fannin County, Texas, built in 1937-1938 by the Kansas City Bridge Company.","why_significant":"The bridge was built with federal emergency relief funds under the National Industrial Recovery Act, tying it to Depression-era public works, which supports Criterion A at the state level. It is also the last remaining K-truss highway bridge in Texas and a rare combination of K-truss through spans and camelback pony truss spans, supporting Criterion C in engineering.","narrative":"Carrying State Highway 78 across the Red River between Fannin County, Texas, and Bryan County, Oklahoma, this steel bridge is 2,108 feet long. It has eight riveted K-truss through spans and two camelback pony truss spans at each end, resting on concrete piers and abutments. Oklahoma Highway Commission engineers designed it with Texas review, and the Kansas City Bridge Company built it from 1937 to 1938. It replaced a suspension toll bridge that collapsed in a January 1934 storm. Federal emergency funds under the National Industrial Recovery Act paid for nearly all of the work, and flooding and riverbank erosion delayed construction and led to steel jetties for bank protection. The bridge is significant as a Depression-era public works project and as a rare design. Texas rarely used K-trusses, and this is the last K-truss highway bridge left in the state. It is also the fifth longest highway department truss bridge in Texas.","period_of_significance":"1937-1938","architect_builder":"Bridge Designer: Oklahoma Highway Commission; Truss Fabricator: Illinois Steel Bridge Company of Jacksonville, Illinois; Bridge Builder: Kansas City Bridge Company of Kansas City, Missouri","architectural_style":"Other: K-truss through bridge","criteria":["A","C"],"status_note":"Current function is still vehicular road transportation; the form says the bridge appears relatively unchanged since 1938 and no projects were planned.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:24.060642-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/44/9691/40969144/content/electronic-records/rg-079/NPS_TX/96001517.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/96001517/559ecd6a4b-800.webp","url_1600":"https://nationalhistoricalregister.com/media/96001517/559ecd6a4b-1600.webp","licence":"CC BY-SA 3.0","author":"Henley Quadling","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:State_Highway_78_Bridge_at_the_Red_River.jpg\" rel=\"noopener\">Henley Quadling</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:State_Highway_78_Bridge_at_the_Red_River.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/40969144","wikipedia":"https://en.wikipedia.org/wiki/State_Highway_78_Bridge_at_the_Red_River","wikidata":"https://www.wikidata.org/wiki/Q14711338"},"indexable":true,"url":"https://nationalhistoricalregister.com/texas/fannin-county/state-highway-78-bridge-at-the-red-river-96001517/"}