{"nrhp_refnum":"95000102","name":"Jefferson Ordnance Magazine","other_names":["Jefferson Powder Magazine","41mr44"],"category":"building","location":{"address":"0.3 mi. NE of US 59B crossing of Big Cypress Bayou","address_restricted":false,"city":"Jefferson","county":"Marion County","state":"TX","lat":32.758309445000066,"lon":-94.33842995699996,"geom_source":"nps_gis"},"listed_date":"1995-02-17","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Military"],"significance_levels":["state"],"summary":{"what_it_is":"A small one-and-a-half-story, single-room brick powder and munitions magazine with a shed roof, standing on private land beside Big Cypress Bayou near Jefferson, Marion County, Texas. It was built during the Civil War, probably in late 1863 or early 1864.","why_significant":"It is argued to be the only surviving building of the Confederate Trans-Mississippi Department's East Texas ordnance transport and storage network, which linked Tyler and Marshall to Shreveport via Jefferson's water access. It is also described as the most intact Civil War brick ordnance magazine in East Texas. Its vented hollow-wall design and brickwork may yield information on munitions storage construction.","narrative":"Beside Big Cypress Bayou outside Jefferson, Texas, a small brick building survives from the Civil War. Ten feet square and about 14.5 feet tall, it has a shed roof, a single door, and two small openings in its loft. Hollow spaces inside the walls connect to vents, keeping the bricks dry and the interior temperature steady while offering better security than ground-floor windows. Built probably in late 1863 or early 1864, it stored powder and munitions for the Confederate Trans-Mississippi Department, whose supplies moved between Tyler, Marshall, Shreveport and Jefferson's water route. Two similar brick buildings once stood nearby but were dismantled in the early twentieth century, leaving this one as the only known surviving ordnance building of that network in East Texas. The surrounding land remains undeveloped. Repairs in 1992 replaced some wood elements with reversible, conjectural pieces. Its military role and its construction details are the basis for its recognition.","period_of_significance":"c. 1863-1865","architect_builder":"unknown","architectural_style":"OTHER/vernacular/military powder magazine","criteria":["A","C","D"],"status_note":"Listed as vacant and not in use. Stabilization, repair and partial restoration were completed in fall 1992, and more than 90 percent of the brick walls are original.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:23.808257-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/32/9729/40972932/content/electronic-records/rg-079/NPS_TX/95000102.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/95000102/964b581e57-800.webp","url_1600":"https://nationalhistoricalregister.com/media/95000102/964b581e57-1600.webp","licence":"Public domain","author":"Mitchel23 at en.wikipedia","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Jeffordnance.jpg\" rel=\"noopener\">Mitchel23 at en.wikipedia</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Jeffordnance.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/40972932","wikipedia":"https://en.wikipedia.org/wiki/Jefferson_Ordnance_Magazine","wikidata":"https://www.wikidata.org/wiki/Q6175548"},"indexable":true,"url":"https://nationalhistoricalregister.com/texas/marion-county/jefferson-ordnance-magazine-95000102/"}