{"nrhp_refnum":"96001114","name":"State Highway 3 Bridge at the Trinity River","other_names":["US 90 Bridge at the Trinity River","Lb0028-03-022"],"category":"structure","location":{"address":"US 90, 1.3 mi. W of jct. with FM 2684","address_restricted":false,"city":"Liberty","county":"Liberty County","state":"TX","lat":30.05779376600003,"lon":-94.81935357299994,"geom_source":"nps_gis"},"listed_date":"1996-10-10","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"A steel Parker through truss highway bridge carrying eastbound US 90 (former State Highway 3) over the Trinity River just west of Liberty, Liberty County, Texas. It was built in 1929-1930 by the Austin Bridge Company to a Texas Highway Department design.","why_significant":"The bridge is significant under Criterion C in the area of Engineering at the state level for embodying the defining characteristics of a Texas Highway Department truss bridge. It is the only surviving example of the earlier version of the T24-150 standard truss design and is judged the best of the three surviving examples. At 1,463 feet it is the longest surviving Parker truss bridge from 1930 or earlier.","narrative":"Carrying eastbound US 90 over the Trinity River just west of Liberty, this 1,463-foot bridge combines three 150-foot steel Parker through truss spans with 30 concrete and steel approach spans. The Austin Bridge Company built it between 1929 and 1930 for the Texas Highway Department, replacing an unsafe 1914 truss bridge that had been the site of several serious accidents. The truss spans follow the department's T24-150 standard design. This bridge is the only surviving example of the design's earlier 1928 version, and it is considered the best of three surviving examples. It is also the longest Parker truss bridge remaining from 1930 or earlier, and the only extant highway truss bridge with shortened concrete paneled entrance railing. The railings were cut down in 1948 as a safety measure. A companion bridge added in 1959-1962 now handles westbound traffic, which allowed the original truss to remain in service.","period_of_significance":"1929-1930","architect_builder":"Bridge Designer: Texas Highway Department; Truss Fabricator: Virginia Bridge & Iron Company of Roanoke, Virginia; Bridge Builder: Austin Bridge Company of Dallas, Texas","architectural_style":"Other: Parker through truss bridge","criteria":["C"],"status_note":"Still in place carrying eastbound vehicular traffic on US 90; a companion bridge built 1959-1962 carries westbound lanes, and the truss bridge is planned to be kept for pedestrian and/or bicycle use.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:23.571337-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/52/9698/40969852/content/electronic-records/rg-079/NPS_TX/96001114.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/96001114/10b4c53967-800.webp","url_1600":"https://nationalhistoricalregister.com/media/96001114/10b4c53967-1600.webp","licence":"CC BY 4.0","author":"Larry D. Moore","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:State_highway_3_bridge_at_the_trinity_river.jpg\" rel=\"noopener\">Larry D. Moore</a>, <a href=\"https://creativecommons.org/licenses/by/4.0\" rel=\"license noopener\">CC BY 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:State_highway_3_bridge_at_the_trinity_river.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/40969852","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q110001114"},"indexable":true,"url":"https://nationalhistoricalregister.com/texas/liberty-county/state-highway-3-bridge-at-the-trinity-river-96001114/"}