{"nrhp_refnum":"82002256","name":"Ohm, John, House","other_names":["The John Ohm House"],"category":"building","location":{"address":"31524 S. Kasson Rd.","address_restricted":false,"city":"Tracy","county":"San Joaquin County","state":"CA","lat":37.66767935300004,"lon":-121.26200183099996,"geom_source":"nps_gis"},"listed_date":"1982-02-04","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Agriculture","Exploration/Settlement","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-story, wood-frame bungalow farmhouse on a four-acre ranch complex on South Kasson Road, about 6 miles southeast of Tracy, California, near the site of San Joaquin City. It was built in 1908 by the Ohm family.","why_significant":"The nomination argues the house is significant for its association with San Joaquin City, a river shipping town that vanished after World War I, and with John Ohm, a prominent San Joaquin Valley rancher. With its outbuildings, the largely unchanged house gives insight into turn-of-the-century farm life. A reviewer's note also cites criteria A, B and C.","narrative":"Built in 1908 on a four-acre ranch complex southeast of Tracy, this two-story wood-frame bungalow was the home of rancher John Ohm and his family. A German-born immigrant who arrived in California in 1881, Ohm became one of the San Joaquin Valley's most extensive ranchers and a promoter of progressive irrigation. The house sits near the site of San Joaquin City, once a busy shipping point on the San Joaquin River that declined after a new river channel bypassed it in 1911. The sweeping side-gabled roof, dormers, exposed purlins and veranda with Colonial Revival columns show bungalow design, while the interior follows a Victorian central-hall plan suited to cross ventilation. Original carbide lighting fixtures and brass hardware survive. A tankhouse and cookhouse remain among the outbuildings. Little changed over seven decades, the property is one of few reminders of the vanished river town and of turn-of-the-century farm life.","period_of_significance":"1900-","architect_builder":"Unknown","architectural_style":"Bungalow, with Colonial Revival columns and a Victorian-based interior floor plan","criteria":["A","B","C"],"status_note":"Listed as vacant with work in progress and in fair condition. A new owner planned to restore the house, tankhouse and cookhouse.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:32.299866-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/82002256.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/82002256/8dab741342-800.webp","url_1600":"https://nationalhistoricalregister.com/media/82002256/8dab741342-1600.webp","licence":"CC BY-SA 3.0","author":"Michael Aivaliotis","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:John_Ohm_House_-_Tracy,_CA.JPG\" rel=\"noopener\">Michael Aivaliotis</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:John_Ohm_House_-_Tracy,_CA.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123861407","wikipedia":"https://en.wikipedia.org/wiki/John_Ohm_House","wikidata":"https://www.wikidata.org/wiki/Q14682526"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/san-joaquin-county/ohm-john-house-82002256/"}