{"nrhp_refnum":"91000003","name":"Northwest No. 1 Boundary Marker of the Original District of Columbia","other_names":["NW1,Jurisdiction Stone","DHR File No. 00-22"],"category":"object","location":{"address":"3607 Powhatan St.","address_restricted":false,"city":"Arlington","county":"Arlington County","state":"VA","lat":38.90305332600008,"lon":-77.15915188899999,"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, about 11 by 11 by 27.5 inches, in the rear side yard of a private residence at 3607 Powhatan Street, Arlington, Virginia. It was placed in 1791-1792 and is surrounded by an iron fence added in 1916.","why_significant":"The stone marked the first mile on the northwest side of the original District of Columbia, one mile from the West Cornerstone. It is nominated under Criterion A as part of the group of boundary markers, with significance in community planning and development and in politics and government. The group context is set out in a separate multiple property documentation form.","narrative":"Set on a wooded hillside behind a private home at 3607 Powhatan Street in Arlington, Virginia, this small Aquia sandstone block is the Northwest No. 1 mile marker of the original District of Columbia. It was placed in 1791-1792 to mark the first mile on the northwest side of the federal territory, measured from the West Cornerstone. The stone measures about 11 by 11 by 27.5 inches and is partly sheared off at an angle on its northeast side. A survey from 1894-97 had already noted that part of the top was broken. In 1916 the Richard Arnold Chapter of the Daughters of the American Revolution placed a wrought iron fence around it, painted dark green, with a bronze plaque identifying it as an original federal boundary stone. The area is fairly well maintained and barely visible from the road. It was listed for its connection with the creation and layout of the national capital, with significance spanning 1791 to 1916.","period_of_significance":"1791-1916","architect_builder":"Unknown","architectural_style":null,"criteria":["A"],"status_note":"Fairly well maintained; the stone is partly sheared off at an angle on the northeast side, and a wrought iron fence painted dark green surrounds it.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:52:01.043027-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/50/6785/41678550/content/electronic-records/rg-079/NPS_VA/91000003.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/41678550","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/virginia/arlington-county/northwest-no-1-boundary-marker-of-the-original-district-of-columbia-91000003/"}