{"nrhp_refnum":"05001529","name":"Mystic Valley Parkway, Metropolitan Park System of Greater Boston MPS","other_names":[],"category":"district","location":{"address":"Mystic Valley Parkway","address_restricted":false,"city":"Arlington","county":"Middlesex County","state":"MA","lat":42.41634450000004,"lon":-71.12968133870964,"geom_source":"nps_gis"},"listed_date":"2006-01-18","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Communications","Conservation","Engineering","Entertainment/Recreation","Landscape Architecture","Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"A river parkway of just under five miles running through Winchester, Medford, Arlington and Somerville, Massachusetts, beside the Aberjona River, Mystic Lakes and Mystic River. It was built from 1896 by the Metropolitan Park Commission as part of Boston's regional park system.","why_significant":"The nomination argues the parkway is significant at the state level under Criteria A and C, in architecture, conservation, community planning and development, engineering, entertainment/recreation, landscape architecture and transportation. It fulfills the registration requirements for the river parkway property subtype in the Metropolitan Park System multiple property documentation. It also reflects Charles Eliot's vision of protecting the Mystic Lakes and river banks for public use.","narrative":"Mystic Valley Parkway is a river parkway of just under five miles that follows the Aberjona River, the Mystic Lakes and the Mystic River through Winchester, Medford, Arlington and Somerville, Massachusetts. Planned as part of Boston's metropolitan park system, it was first taken by the Metropolitan Park Commission in 1895, construction began in 1896, and it opened to traffic in September 1897. The road was built 36 feet wide and lit by 66 lights spaced 200 feet apart. Charles Eliot had urged public acquisition of the lake shores to guard against suburban subdivision and pollution. Today the nominated route includes four segments, along with features such as Nelson Circle, the 1936-37 Mystic River Bridge and the Meadow Brook Culvert. A later segment east of Armory Bridge was left out because Interstate 93 construction destroyed its integrity. The parkway is recognized for its roles in landscape architecture, engineering, conservation, recreation and transportation planning.","period_of_significance":null,"architect_builder":"Metropolitan Park Commission (MPC); later Metropolitan District Commission (MDC); Charles Eliot named as planner of the park acquisitions","architectural_style":null,"criteria":["A","C"],"status_note":"Described as a heavily traveled roadway administered by the Department of Conservation and Recreation; the Eastern Segment was excluded for lack of integrity after construction of Interstate 93.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:13:04.742507-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/82/7913/63791382/content/electronic-records/rg-079/NPS_MA/05001529.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/05001529/5c9ad5a55c-800.webp","url_1600":"https://nationalhistoricalregister.com/media/05001529/5c9ad5a55c-1600.webp","licence":"CC BY-SA 4.0","author":"User:Magicpiano","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:ArlingtonMA_MysticParkway.jpg\" rel=\"noopener\">User:Magicpiano</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:ArlingtonMA_MysticParkway.jpg"},"district":{"nrhp_refnum":"04000249","name":"Alewife Brook Parkway","url":"https://nationalhistoricalregister.com/districts/massachusetts/alewife-brook-parkway-04000249/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/63791382","wikipedia":"https://en.wikipedia.org/wiki/Mystic_Valley_Parkway","wikidata":"https://www.wikidata.org/wiki/Q1956931"},"indexable":true,"url":"https://nationalhistoricalregister.com/massachusetts/middlesex-county/mystic-valley-parkway-metropolitan-park-system-of-greater-boston-mps-05001529/"}