{"nrhp_refnum":"91000008","name":"Southwest No. 3 Boundary Marker of the Original District of Columbia","other_names":["SW3,Jurisdiction Stone"],"category":"object","location":{"address":"2952 King St.","address_restricted":false,"city":"Alexandria (Independent City)","county":"Alexandria","state":"VA","lat":38.82066130100003,"lon":-77.07937647699998,"geom_source":"nps_gis"},"listed_date":"1991-02-01","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Community Planning and Development","Politics/Government"],"significance_levels":["national"],"summary":{"what_it_is":"A sandstone boundary marker, with a surrounding wrought iron fence, located in the parking lot of the First Baptist Church on King Street in Alexandria, Virginia. It is one of the stones marking the original boundary of the District of Columbia.","why_significant":"The stone marked the third mile on the southwest side of the District, measured from the South Cornerstone at Jones Point. It was the first marker in Virginia placed at other than an equal-mile interval, because the end of the mile fell in a ravine. It is tied to the development of the federal city.","narrative":"Southwest No. 3 is a sandstone boundary marker in the parking lot of a church on King Street in Alexandria, Virginia. It is one of the stones set to mark the edge of the original District of Columbia. The stone now measures about 12 by 11 by 19 inches, and its top and edges are chipped, so part of the inscription is gone. The surviving text includes \"M 302p,\" meaning two miles and 302 poles. A wrought iron fence, painted silver and placed in June 1917, surrounds it. The marker is notable for its spacing. It was the first Virginia stone not set at an equal mile interval, because the end of the third mile fell in a ravine. Surveyors placed it on higher ground, slightly less than three miles from the South Cornerstone at Jones Point. Its listing rests on its link to the creation and layout of the federal city, with a period of significance from 1791 to 1917.","period_of_significance":"1791-1917","architect_builder":"Unknown","architectural_style":null,"criteria":["A"],"status_note":"The top and edges are chipped and part of the original inscription is missing. The stone sits among painted parking places in a church parking lot, inside a silver-painted iron fence placed in 1917.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:52:01.144006-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/6/6785/41678506/content/electronic-records/rg-079/NPS_VA/91000008.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/41678506","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/virginia/alexandria/southwest-no-3-boundary-marker-of-the-original-district-of-columbia-91000008/"}