{"nrhp_refnum":"84002961","name":"Raymondville Parabolic Bridge","other_names":[],"category":"structure","location":{"address":"Grant Rd. over Raquette River","address_restricted":false,"city":"Raymondville","county":"St. Lawrence County","state":"NY","lat":44.83978354800007,"lon":-74.97940268199994,"geom_source":"nps_gis"},"listed_date":"1984-09-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"A single-span metal through truss bridge carrying Grant Road over the Raquette River at Raymondville, Town of Norfolk, St. Lawrence County, New York. It was built in 1886 by the Berlin Iron Bridge Company and has a 288-foot clear span.","why_significant":"It is the longest single-span lenticular (\"parabolic\") truss bridge the Berlin Iron Bridge Company ever built and the largest surviving example of its type in New York State. It uses the William O. Douglas patented design in a rare Warren truss form. It also retains unusual integrity and reflects innovation in post-Civil War American metal bridge building.","narrative":"Spanning the Raquette River at Raymondville, this 1886 metal through truss bridge links the hamlet on the west bank with the town of Norfolk on the east. Its clear span measures 288 feet, and its deck is 18 feet wide. Two pin-connected Warren trusses of nine panels each form the \"parabolic\" or lenticular profile, with a segmental arch upper chord and wrought-iron eye bars below. The Berlin Iron Bridge Company of East Berlin, Connecticut, manufactured and erected it using a design patented by engineer William O. Douglas of Binghamton. It is the longest single-span lenticular bridge the company built and the largest surviving example in New York State. The Warren truss layout is unusual among the firm's remaining spans. The bridge keeps its original portal cresting, maker's plaques and most of its decorative finials, though the deck was replaced in 1965 and concrete abutments replaced the stone ones. Closed to vehicles since 1979, it still serves pedestrians.","period_of_significance":"1886","architect_builder":"Berlin Iron Bridge Company","architectural_style":"Lenticular (\"parabolic\") Warren through truss","criteria":[],"status_note":"Closed to vehicular traffic since 1979; remains in use as a pedestrian crossing. Condition is listed as good and altered.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:43.499009-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/84002961.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/84002961/1fbbca2adb-800.webp","url_1600":"https://nationalhistoricalregister.com/media/84002961/1fbbca2adb-1600.webp","licence":"Public domain","author":null,"credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:OBLIQUE_ELEVATION,_LOOKING_NORTHEAST._-_Grant_Road_Bridge,_Spanning_Raquette_River_at_Grant_Road,_Raymondville,_St._Lawrence_County,_NY_HAER_NY,45-RAYM,2-2.tif\" rel=\"noopener\">Unknown author</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:OBLIQUE_ELEVATION,_LOOKING_NORTHEAST._-_Grant_Road_Bridge,_Spanning_Raquette_River_at_Grant_Road,_Raymondville,_St._Lawrence_County,_NY_HAER_NY,45-RAYM,2-2.tif"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75321922","wikipedia":"https://en.wikipedia.org/wiki/Raymondville_Parabolic_Bridge","wikidata":"https://www.wikidata.org/wiki/Q7299278"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/st-lawrence-county/raymondville-parabolic-bridge-84002961/"}