{"nrhp_refnum":"73000418","name":"Malakoff Diggins-North Bloomfield Historic District","other_names":[],"category":"district","location":{"address":"Graniteville Star Route","address_restricted":false,"city":"North Bloomfield","county":"Nevada County","state":"CA","lat":39.37096543150005,"lon":-120.91326706151423,"geom_source":"nps_gis"},"listed_date":"1973-04-11","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Commerce","Architecture","Social History"],"significance_levels":["state"],"summary":{"what_it_is":"A historic district at North Bloomfield, Nevada County, California, covering about 865 acres of the old gold-mining town and the Malakoff Diggins hydraulic mine pit, now a California state park.","why_significant":"The district preserves a mid-19th-century gold-region town of simple wood-frame homes and businesses beside the huge excavations left by hydraulic mining. It records the Gold Rush founding of the camp, the hydraulic mining era of 1866-1884, and its end through anti-debris laws and the Sawyer decision of 1884. The form also credits the eroded canyon landscape as a major environmental resource.","narrative":"North Bloomfield and the adjoining Malakoff Diggins in Nevada County, California, form an 865-acre district that combines a surviving gold-mining town with the scarred landscape of hydraulic mining. The town began as a camp called Humbug in the early 1850s, was renamed Bloomfield and then North Bloomfield, and reached a peak population of 1,200 to 1,800 around 1880. Its wood-frame stores, houses, a livery stable, school, church and barn show the plain, high-roofed construction typical of the California gold regions. Among them is the 1852 McKillian and Mobley store, now a house museum furnished as an 1880s general store. Beyond town, cliffs up to 600 feet high remain from hydraulic operations that ran from 1866 to 1884, when anti-debris laws and the Sawyer decision ended the practice. By 1972 only about nine people lived in the town, and the area is now managed as a state historic park.","period_of_significance":null,"architect_builder":null,"architectural_style":"Simple frame vernacular buildings typical of California gold-region towns (board and batten, clapboard, channel rustic, little decoration)","criteria":[],"status_note":"State-owned park; condition of buildings ranges from excellent to poor. The McKillian and Mobley store is a house museum, Cummins Hall is a park office and museum, and several houses are described as fair or poor but reclaimable.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:31.318105-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/73000418.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/73000418/2c8c6db6d0-800.webp","url_1600":"https://nationalhistoricalregister.com/media/73000418/2c8c6db6d0-1600.webp","licence":"CC BY-SA 3.0","author":"J.smith, Retouched by Mmxx","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Malakoff_Diggins,_State_Historic_Park_(Retouched).JPG\" rel=\"noopener\">J.smith, Retouched by Mmxx</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:Malakoff_Diggins,_State_Historic_Park_(Retouched).JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123860133","wikipedia":"https://en.wikipedia.org/wiki/Malakoff_Diggins_State_Historic_Park","wikidata":"https://www.wikidata.org/wiki/Q6741178"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/nevada-county/malakoff-diggins-north-bloomfield-historic-district-73000418/"}