{"nrhp_refnum":"84000303","name":"Main Street Bridge","other_names":[],"category":"structure","location":{"address":"Main St. at Genesee River","address_restricted":false,"city":"Rochester","county":"Monroe County","state":"NY","lat":43.15612732300008,"lon":-77.61060344199996,"geom_source":"nps_gis"},"listed_date":"1984-10-11","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"A five-arch stone bridge carrying Main Street over the Genesee River in the center of Rochester, Monroe County, New York, built in 1857 and designed by Daniel Marsh with I. F. Quinby.","why_significant":"The nomination argues the bridge is an intact representative example of mid-nineteenth century bridge construction technology. It is also one of four historic links between the two river banks of Rochester's central business district. As the earliest of the three stone bridges in the multiple resource area, it may have influenced the design and materials of the two later stone bridges.","narrative":"Carrying Main Street across the Genesee River in downtown Rochester, this stone bridge was built in 1857 to designs by Daniel Marsh with I. F. Quinby, and G. S. Copeland served as builder. It has five segmental arches with spans of 30 to 42 feet, limestone voussoirs and four piers. Originally 79.4 feet wide, it was widened twenty feet to the south in the 1870s. It is the fourth bridge on the site; earlier wooden spans deteriorated under traffic and river ice. City officials chose durable stone, though millers wanted fewer, broader arches to ease river flow while developers wanted more arches to support buildings along the bridge. Shops once stood on both sides until they were removed in 1964-65. The bridge is valued as an intact example of mid-nineteenth century construction and as the earliest of three stone bridges linking Rochester's two riverbank commercial districts. It is owned by the city and remains in use as a bridge.","period_of_significance":null,"architect_builder":"Architect Daniel Marsh (with I. F. Quinby); builder G. S. Copeland","architectural_style":null,"criteria":[],"status_note":"Owned by the City of Rochester and used as a bridge; condition rated fair, with no threats known. Buildings along the north and south sides were removed in 1964-65 and the roadway was repaved.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:42.436061-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/84000303.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/84000303/b0029ac159-800.webp","url_1600":"https://nationalhistoricalregister.com/media/84000303/b0029ac159-1600.webp","licence":"Public domain","author":"Martin Stupich","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Main_Street_Bridge,_Main_Street_East,_spanning_Genesee_River,_Rochester_(Monroe_County,_New_York).jpg\" rel=\"noopener\">Martin Stupich</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Main_Street_Bridge,_Main_Street_East,_spanning_Genesee_River,_Rochester_(Monroe_County,_New_York).jpg"},"district":{"nrhp_refnum":"100010188","name":"Four Corners-Genesee Crossroads Historic District","url":"https://nationalhistoricalregister.com/districts/new-york/four-corners-genesee-crossroads-historic-district-100010188/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75313664","wikipedia":"https://en.wikipedia.org/wiki/Main_Street_Bridge_(Rochester,_New_York)","wikidata":"https://www.wikidata.org/wiki/Q6736101"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/monroe-county/main-street-bridge-84000303/"}