{"nrhp_refnum":"96001110","name":"State Highway 35 Bridge at the West Fork of the San Jacinto River","other_names":["US 59 Bridge at the W. Fork of the San Jacinto R.","Hr0177-06-"],"category":"structure","location":{"address":"US 59, 1.4 mi. N of jct. with FM 1960","address_restricted":false,"city":"Humble","county":"Harris County","state":"TX","lat":30.026726781000036,"lon":-95.25806877699995,"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 with concrete girder approach spans and a separate relief structure, carrying the US 59 northbound frontage road (former State Highway 35) over the West Fork of the San Jacinto River near Humble, Harris County, Texas. It was built in 1930-1931.","why_significant":"The bridge embodies the defining characteristics of a Texas Highway Department truss bridge, qualifying under Criterion C in Engineering at the state level. It uses the T22-200 standard design, of which only three examples survive in Texas. At 1,499 feet overall, it is the longest Parker truss bridge in Texas surviving from 1931 or earlier.","narrative":"This steel truss bridge carries the northbound frontage road of US 59, formerly State Highway 35, across the West Fork of the San Jacinto River near Humble. Built between October 1930 and September 1931 by the Standard Construction Company of Houston, it has two 200-foot Parker through truss spans, 30 concrete girder approach spans and a nearby seven-span relief structure. The Texas Highway Department chose its T22-200 standard design, one of 25 developed for Parker trusses, and only three examples survive in Texas. At 1,499 feet overall, it is the longest Parker truss bridge in the state surviving from 1931 or earlier. The project cost just over $211,000, with $100,000 in federal funds. Later work included shortened approach railing after 1944 and companion bridges built in 1960-61 and 1971-74, which moved traffic off the old span and allowed its preservation. It was recognized for engineering significance at the state level.","period_of_significance":"1930-1931","architect_builder":"Bridge Designer: Texas Highway Department; Truss Fabricator: Houston Structural Steel Company, owned and operated by the Mosher Steel & Machinery Company of Dallas, Texas; Bridge Builder: Standard Construction Company of Houston, Texas","architectural_style":"Other: Parker through truss bridge","criteria":["C"],"status_note":"Still in vehicular use on the northbound frontage road of US 59; a new bridge was planned for 1997-1999, with the original structure to be left in place for pedestrian use.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:24.162426-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/83/9694/40969483/content/electronic-records/rg-079/NPS_TX/96001110.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/96001110/1c44102ff1-800.webp","url_1600":"https://nationalhistoricalregister.com/media/96001110/1c44102ff1-1600.webp","licence":"CC BY-SA 4.0","author":"Jim Evans","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Old_San_Jacinto_River_Truss_Bridge_--_Humble,_Texas.jpg\" rel=\"noopener\">Jim Evans</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Old_San_Jacinto_River_Truss_Bridge_--_Humble,_Texas.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/40969483","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q110001112"},"indexable":true,"url":"https://nationalhistoricalregister.com/texas/harris-county/state-highway-35-bridge-at-the-west-fork-of-the-san-jacinto-river-96001110/"}