{"nrhp_refnum":"77001463","name":"International Boundary Marker","other_names":["Republic of Texas Granite Marker"],"category":"object","location":{"address":"SE of Deadwood off SR 31 at LA State line","address_restricted":false,"city":"Deadwood","county":"Panola County","state":"TX","lat":32.03379334300007,"lon":-94.04228564499994,"geom_source":"nps_gis"},"listed_date":"1977-04-13","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Exploration/Settlement","Politics/Government"],"significance_levels":["national"],"summary":{"what_it_is":"A small granite boundary post, about four feet high and six inches square, standing about 100 feet off FM 31 on the Texas-Louisiana line near Deadwood, Panola County, Texas. It was prepared in 1840 and erected in spring 1841 to mark the 32nd parallel on the international boundary.","why_significant":"The nomination argues it is the only remaining granite survey post marking the 1841 boundary between the United States and the Republic of Texas. It represents the difficult early nineteenth-century engineering work of surveying an international boundary, one negotiated with three foreign nations. It also served as the reference point for mile markers run northward to the Red River.","narrative":"A four-foot granite shaft, six inches square, stands a short distance off FM 31 on the Texas-Louisiana line near Deadwood. It was prepared in 1840 and set in place in spring 1841 by a joint commission surveying the boundary between the United States and the Republic of Texas. Its faces are inscribed \"R. T.\" on the west, \"U.S.\" on the east and a meridian boundary notice dated 1840 on the south. The post marked the 32nd parallel, and mile markers were then run north to the Red River from it. Woodsmen rediscovered it in 1971, and it is the only remaining granite post of that 1841 boundary survey. The surveyors faced forests, swamps, fever, missing instruments and shortages of funds before reaching the Red River in June 1841. The marker is valued as an example of early American boundary engineering. A three-acre park dedicated in 1976 now memorializes it.","period_of_significance":"1800-1899","architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"Condition listed as excellent, unaltered and on its original site; a three-acre park dedicated in 1976 memorializes the marker, with the land owned by Texas and Louisiana interests on their respective sides.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:19.673005-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/58/9731/40973158/content/electronic-records/rg-079/NPS_TX/77001463.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/77001463/d7ab54826a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/77001463/d7ab54826a-1600.webp","licence":"CC BY-SA 4.0","author":"Renelibrary","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:InternationalBoundaryMarker_(1_of_1).jpg\" rel=\"noopener\">Renelibrary</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:InternationalBoundaryMarker_(1_of_1).jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/40973158","wikipedia":"https://en.wikipedia.org/wiki/International_Boundary_Marker","wikidata":"https://www.wikidata.org/wiki/Q16892695"},"indexable":true,"url":"https://nationalhistoricalregister.com/texas/panola-county/international-boundary-marker-77001463/"}