{"nrhp_refnum":"78002438","name":"Pennsylvania Canal and Limestone Run Aqueduct","other_names":["West Branch Division of the Pennsylvania Canal and Limestone"],"category":"structure","location":{"address":"Bounded by Broadway, Filbert St., Limestone Run and Bound Ave.","address_restricted":false,"city":"Milton","county":"Northumberland County","state":"PA","lat":41.01855544500003,"lon":-76.85325919007575,"geom_source":"nps_gis"},"listed_date":"1978-12-19","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation"],"significance_levels":["state"],"summary":{"what_it_is":"The Limestone Run Aqueduct is a small stone and wood aqueduct carrying the West Branch Division of the Pennsylvania Canal over Limestone Run in the Borough of Milton, Northumberland County, Pennsylvania. It is the only standing structure of the Milton Section of the canal.","why_significant":"The nomination argues that the canal was an important connector in the Pennsylvania canal system and that its opening in 1830 was one of the most important events in Milton's history, boosting an already growing economy. The aqueduct is the surviving physical element of that section. The document also notes the canal area's potential for reconstruction and redevelopment as a district reflecting the 1830-1860 period.","narrative":"Built between 1829 and 1830 by the Commonwealth of Pennsylvania, the Limestone Run Aqueduct carries the West Branch Division of the Pennsylvania Canal over Limestone Run at Milton, in Northumberland County. Engineer Francis W. Rawle designed the structure, and the contractors and builders were McCormick and Montgomery, with Follmer and Levan named for the Milton section. The aqueduct is a single span of 20 feet, built of stone and wood, with an overall width of 75 feet, a trunk width of 30 feet, and a height of 7 feet. The West Branch Division first opened in November 1830, linking the canal system at Northumberland. The canal's arrival transformed Milton, which was already an agricultural and industrial center, and it gave impetus to the local economy. Lumber was the main cargo on this section. The aqueduct is the only standing feature of the Milton section, and its stone abutments remain in good condition.","period_of_significance":"1829-1830","architect_builder":"Francis W. Rawle (engineer); McCormick & Montgomery and Follmer & Levan (contractors/builders)","architectural_style":null,"criteria":["A"],"status_note":"Only the aqueduct is standing; its stone abutments are in good condition but have been used as footers for a railroad bridge. The canal bed is filled and the towpath cannot be seen.","vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:30.061349-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/78002438.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/78002438/b836ad91e6-800.webp","url_1600":"https://nationalhistoricalregister.com/media/78002438/b836ad91e6-1600.webp","licence":"CC BY-SA 3.0","author":"Ruhrfisch (talk)","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Pennsylvania_Canal%27s_Limestone_Run_Aqueduct_ruins.jpg\" rel=\"noopener\">Ruhrfisch (talk)</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:Pennsylvania_Canal%27s_Limestone_Run_Aqueduct_ruins.jpg"},"district":{"nrhp_refnum":"86001933","name":"Milton Historic District","url":"https://nationalhistoricalregister.com/districts/pennsylvania/milton-historic-district-86001933/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71996582","wikipedia":"https://en.wikipedia.org/wiki/Pennsylvania_Canal_and_Limestone_Run_Aqueduct","wikidata":"https://www.wikidata.org/wiki/Q7163677"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/northumberland-county/pennsylvania-canal-and-limestone-run-aqueduct-78002438/"}