{"nrhp_refnum":"89001539","name":"Newton Street Bridge","other_names":[],"category":"structure","location":{"address":"Newton St. at River St. over the Charles River","address_restricted":false,"city":"Waltham","county":"Middlesex County","state":"MA","lat":42.37242664300004,"lon":-71.22874444499996,"geom_source":"nps_gis"},"listed_date":"1989-09-28","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Community Planning and Development","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A triple-arch stone bridge carrying Newton Street over the Charles River at River Street in Waltham, Massachusetts, built in 1877 and designed by Hiram Blaisdell of Concord.","why_significant":"It is the only late 19th-century bridge over the Charles River in Waltham that has not been widened or substantially rebuilt. It is a handsome example of a triple-arch stone bridge by a Concord bridge specialist. It also occupies the site of Waltham's first bridge across the Charles, built in 1761-62.","narrative":"Newton Street crosses the Charles River in Waltham on a stone bridge completed in the latter part of 1877. The structure has three broad elliptical arches edged with granite voussoirs, and its granite blocks are rock faced. A border of granite blocks along the top shows irregularly spaced notches on their narrow sides. Hiram Blaisdell of Concord is credited with the design, and the date is confirmed by the Waltham Town Report of 1878. The bridge replaced an earlier crossing on the same site: Waltham's first bridge over the Charles, built in 1761-62 with Newton, at the initiative of militia Captain Joshua Fuller and Stephen Shite. It is the only late 19th-century Charles River bridge in Waltham that has not been widened or substantially rebuilt, and it retains its original location, design, materials and workmanship. It was listed for its association with local history and for its design. Its condition is described as good.","period_of_significance":null,"architect_builder":"Hiram Blaisdell (engineer/designer, of Concord, MA)","architectural_style":"Late 19th-century masonry triple-arch stone bridge","criteria":["A","C"],"status_note":"Condition is described as good, with no alterations and not moved.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:13:02.169724-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/35/7919/63791935/content/electronic-records/rg-079/NPS_MA/89001539.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/89001539/c07adae773-800.webp","url_1600":"https://nationalhistoricalregister.com/media/89001539/c07adae773-1600.webp","licence":"CC BY-SA 3.0","author":"Tim Pierce","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Newton_Street_Bridge.jpg\" rel=\"noopener\">Tim Pierce</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Newton_Street_Bridge.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/63791935","wikipedia":"https://en.wikipedia.org/wiki/Newton_Street_Bridge","wikidata":"https://www.wikidata.org/wiki/Q14715775"},"indexable":true,"url":"https://nationalhistoricalregister.com/massachusetts/middlesex-county/newton-street-bridge-89001539/"}