{"nrhp_refnum":"75001490","name":"Miami County Courthouse and Power Station","other_names":[],"category":"building","location":{"address":"Bounded by Main, Short, Plum, and Water Sts.","address_restricted":false,"city":"Troy","county":"Miami County","state":"OH","lat":40.04104622800003,"lon":-84.20506515799997,"geom_source":"nps_gis"},"listed_date":"1975-05-30","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A county courthouse and its separate brick power station in Troy, Ohio, on a city block bounded by Main, Short, Water and Plum Streets. The courthouse was built 1885-1888 to designs by architect J. W. Yost of Columbus.","why_significant":"The courthouse is described as a magnificent 'county capitol' noted for its elegance and proportions, built at a cost of $400,000 by a county of about 40,000 people. The power station, which was the first electrical generating plant in Troy, supplied electricity and steam heat and fed an unusual early air-conditioning system. The building also ended a feud between Piqua and Troy over the county seat.","narrative":"Miami County's courthouse in Troy, Ohio, is a 144-foot-square building in beaux-arts classic style, topped by a great central domed drum rising to 160 feet, with a statue of justice reaching 185 feet. Architect J. W. Yost of Columbus designed it, and contractor T. B. Townsend of Zanesville built it. The cornerstone was laid on July 16, 1885, and county offices were occupied in January 1888. Its construction settled a long dispute between Piqua and Troy over the county seat. The cost of $400,000 was remarkable for a rural county of about 40,000 people. Inside, four wainscoted halls meet beneath the dome, and the top-floor courtroom has polychrome fresco relief work. Across Water Street stands a brick power station, the first electrical generating plant in Troy. It supplied steam and electricity and, through a buried brick duct and an 86-foot chimney, provided a novel form of summer air conditioning. Its machinery is inactive but intact.","period_of_significance":"1885-1888","architect_builder":"Architect J. W. Yost of Columbus; contractor T. B. Townsend of Zanesville","architectural_style":"Beaux-arts classic detail in the American Capitol style","criteria":[],"status_note":"Courthouse listed in fair condition and altered; the power station and its machinery are inactive but standing intact.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:10.036412-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/75001490.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/75001490/f78d817f2d-800.webp","url_1600":"https://nationalhistoricalregister.com/media/75001490/f78d817f2d-1600.webp","licence":"Public domain","author":"Calvin Beale","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Miami_County_Courthouse.jpg\" rel=\"noopener\">Calvin Beale</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Miami_County_Courthouse.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71990305","wikipedia":"https://en.wikipedia.org/wiki/Miami_County_Courthouse_(Ohio)","wikidata":"https://www.wikidata.org/wiki/Q6827302"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/miami-county/miami-county-courthouse-and-power-station-75001490/"}