{"nrhp_refnum":"96000321","name":"Coldbrook Farm","other_names":[],"category":"building","location":{"address":"955 Spring Ln.","address_restricted":false,"city":"Chambersburg","county":"Franklin County","state":"PA","lat":39.93539809550006,"lon":-77.64190986632747,"geom_source":"nps_gis"},"listed_date":"1996-03-28","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-story stone farmhouse with a frame forebay bank barn, stone spring house and a spring-fed pond on about 10.8 acres in the northeastern part of the Borough of Chambersburg, Franklin County, Pennsylvania. The house dates from about 1800-1801.","why_significant":"The nomination argues the house is among the most imposing houses of its period in Franklin County, notable for its unusual size and its interior woodwork, which shows the transition from Georgian to Federal styles. It also cites the use of local limestone and the property's long history as a gentleman's country estate, with Colonial Revival additions. The document links the farm to James Riddle, a judge who is said to have operated a law school there.","narrative":"Coldbrook is a stone house of about 1800 on a knoll above Falling Spring Creek in northeastern Chambersburg. Its two-story central block of five bays is flanked by two wings, and the wings are recessed about a foot from the main facade. Judge James Riddle is associated with its construction, and the layout of the east wing is taken as evidence that he ran a law school there. Its main significance is its interior woodwork, with fireplace mantels, fluted pilasters, and alcoves that show the move from Georgian to Federal styling around 1800-1810. Local limestone, which was readily available in the valley, is used for the walls, and stone construction was uncommon in Franklin County at that time. Colonial Revival additions in the late 19th century, including a colonnaded porch and dormers, were made during the ownership of Augustus Duncan, who held the property from 1876 until 1910. Its size, original trim and long role as a country estate are the reasons for its recognition.","period_of_significance":"C. 1800-1900","architect_builder":null,"architectural_style":"Georgian; Federal","criteria":["C"],"status_note":"Currently in use as a residence with a kitchen, family room addition and garage; the barn is covered in asbestos shingle siding.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:36.078954-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/96000321.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/96000321/e32f137611-800.webp","url_1600":"https://nationalhistoricalregister.com/media/96000321/e32f137611-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Coldbrook_Farm_Frankco.JPG\" rel=\"noopener\">Smallbones</a>, <a href=\"http://creativecommons.org/publicdomain/zero/1.0/deed.en\" rel=\"license noopener\">CC0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Coldbrook_Farm_Frankco.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994975","wikipedia":"https://en.wikipedia.org/wiki/Coldbrook_Farm","wikidata":"https://www.wikidata.org/wiki/Q5142501"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/franklin-county/coldbrook-farm-96000321/"}