{"nrhp_refnum":"90001031","name":"Colorado River Bridge at Bastrop","other_names":[],"category":"site","location":{"address":"SR 150 over the Colorado R.","address_restricted":false,"city":"Bastrop","county":"Bastrop County","state":"TX","lat":30.105156795000028,"lon":-97.32292930699998,"geom_source":"nps_gis"},"listed_date":"1990-07-19","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"A 1,285-foot concrete and steel highway bridge carrying Loop 150 across the Colorado River at Bastrop, Bastrop County, Texas. It was completed in 1923 by the Kansas City Bridge Company, with R.E. Schiller as resident engineer.","why_significant":"The bridge is the second crossing at this site and continues a historic route, the Camino Real or Old San Antonio Road, that was central to Bastrop's growth. It is also an early surviving example of Parker truss use in Texas and of work by the early Texas State Highway Department. It meets Criterion A for Transportation and Criterion C for Engineering.","narrative":"This 1,285-foot bridge carries Loop 150 over the Colorado River in Bastrop, Texas. Three identical riveted steel Parker through trusses, each 192 feet long, cross the river channel on tapered concrete piers, and long concrete approaches with Y-shaped pier bents extend from the west end. Completed in 1923 and opened in January 1924, it replaced an iron toll bridge built in 1890. Bastrop County financed its share through road bonds, the Kansas City Bridge Company built it, and R.E. Schiller served as resident engineer. The design reflects the influence of State Bridge Engineer G.G. Wickline and is one of the earliest surviving uses of the Parker truss in Texas. The crossing lies on the old Camino Real route that shaped Bastrop's settlement and later on the Houston-Austin route. It was listed for its role in transportation and as an example of early highway engineering in Texas. A wooden walkway has been added on the north side.","period_of_significance":"1923-1940","architect_builder":"R.E. Schiller/G.G. Wickline; The Kansas City Bridge Company","architectural_style":"Other: Parker Through Truss","criteria":["A","C"],"status_note":"Still in use as part of state highway Loop 150, providing access to downtown Bastrop from Highway 71. The north-side balustrade has been removed and a walkway added.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:21.924218-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/69/9681/40968169/content/electronic-records/rg-079/NPS_TX/90001031.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/90001031/bca92dcc3b-800.webp","url_1600":"https://nationalhistoricalregister.com/media/90001031/bca92dcc3b-1600.webp","licence":"CC BY 4.0","author":"Larry D. Moore","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Colorado_river_bridge_at_bastrop_2006.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:Colorado_river_bridge_at_bastrop_2006.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/40968169","wikipedia":"https://en.wikipedia.org/wiki/Old_Iron_Bridge_(Bastrop,_Texas)","wikidata":"https://www.wikidata.org/wiki/Q5148889"},"indexable":true,"url":"https://nationalhistoricalregister.com/texas/bastrop-county/colorado-river-bridge-at-bastrop-90001031/"}