{"nrhp_refnum":"91000012","name":"Southwest No. 7 Boundary Marker of the Original District of Columbia","other_names":["SW7,Jurisdiction Stone","DHR File No. 00-22"],"category":"object","location":{"address":"Behind 3101 S. Manchester St.","address_restricted":false,"city":"Fairfax","county":"Arlington County","state":"VA","lat":38.86235711300003,"lon":-77.13302734799998,"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":"An Aquia sandstone boundary marker, the seventh mile stone on the southwest side of the original District of Columbia, set within a small iron fence behind 3101 South Manchester Street (Woodlake Towers Condominiums) in Arlington County, Virginia.","why_significant":"The stone marked the seventh mile on the southwest side of the District of Columbia, measured seven miles from the South Cornerstone at Jones Point. It is tied to the development of the federal city and is part of a group of boundary markers. Scars on the stone may date from Civil War use as target practice near Fort Ramsay and Fort Buffalo.","narrative":"Tucked along a fence line between a condominium complex and Kenmore Intermediate School in Arlington, Virginia, this Aquia sandstone block is the Southwest No. 7 boundary marker of the original District of Columbia. It stands in a small wrought iron enclosure of about three feet by three feet, reached from the parking lot near the condominium tennis courts. The stone marked the seventh mile on the southwest side of the District, measured seven miles from the South Cornerstone at Jones Point. Today it leans toward the southwest and carries scars and cuts, some of which may come from Civil War bullets or grapeshot, since Fort Ramsay and Fort Buffalo were nearby and the markers apparently served as target practice. A survey in 1906 already noted such damage. The marker was listed for its association with the development of the federal city, as one of a larger set of boundary stones, with a period of significance running from 1791 to about 1916.","period_of_significance":"1791-ca. 1916","architect_builder":"Unknown","architectural_style":null,"criteria":["A"],"status_note":"Marker is askew, leaning southwest, defaced by cuts and markings; the wrought iron fence is rusted with flaking paint; there is no plaque.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:59.903108-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/60/6785/41678560/content/electronic-records/rg-079/NPS_VA/91000012.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/41678560","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/virginia/arlington-county/southwest-no-7-boundary-marker-of-the-original-district-of-columbia-91000012/"}