{"nrhp_refnum":"88000759","name":"Market Street Bridge","other_names":[],"category":"structure","location":{"address":"Market St./LR 34 over Susquehanna River","address_restricted":false,"city":"Harrisburg","county":"Cumberland County","state":"PA","lat":40.257511804000046,"lon":-76.88297591399999,"geom_source":"nps_gis"},"listed_date":"1988-06-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["state"],"summary":{"what_it_is":"A sixteen-span concrete barrel-arch highway bridge faced with stone, carrying Market Street across the Susquehanna River between the City of Harrisburg and City Island. It was built in 1928.","why_significant":"The nomination describes it as an excellent example of a long-span monumental urban bridge, with stone-faced arches that recall the long Pennsylvania tradition of stone highway bridges. Its length, finely ornamented piers and approach columns salvaged from the former state capitol are cited as making it notable among the nominated bridges.","narrative":"Spanning the Susquehanna River between Harrisburg and City Island, this highway bridge was completed in 1928 to a design by the engineering firm of Modjeski and Masters, with Paul Philippe Cret as consulting architect. The James McGraw Company built it. Sixteen low barrel arches, each about 89 feet long, carry the roadway over a concrete structure faced with coursed rusticated ashlar and smoother stone for the voussoirs and spandrel walls. Massive round-ended piers originally carried specially designed light standards. Two Ionic columns at the eastern approach were taken from the former state capitol, which was destroyed by fire in 1897. The bridge replaced earlier timber-covered spans designed by Theodore Burr. Its length and ornamentation led to its listing, which rests on engineering achievement and its architectural treatment of a major urban river crossing.","period_of_significance":null,"architect_builder":"Ralph Modjeski and Frank Masters (designers/engineers); Paul Philippe Cret (consulting architect); James McGraw Company (builder/contractor)","architectural_style":null,"criteria":["A"],"status_note":"Vehicular use, original and present; alterations include a concrete slab instead of stone arch on the west shore side and concrete piers on the downstream side.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:37.339678-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/88000759.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/88000759/3c17d0a6bb-800.webp","url_1600":"https://nationalhistoricalregister.com/media/88000759/3c17d0a6bb-1600.webp","licence":"Public domain","author":"Joseph Elliot","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Market_Street_Bridge_(Harrisburg)_HAER_color_1.jpg\" rel=\"noopener\">Joseph Elliot</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Market_Street_Bridge_(Harrisburg)_HAER_color_1.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992864","wikipedia":"https://en.wikipedia.org/wiki/Market_Street_Bridge_(Susquehanna_River)","wikidata":"https://www.wikidata.org/wiki/Q6770752"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/cumberland-county/market-street-bridge-88000759/"}