{"nrhp_refnum":"80003219","name":"Hanson Machinery Company","other_names":[],"category":"building","location":{"address":"235 Miami St.","address_restricted":false,"city":"Tiffin","county":"Seneca County","state":"OH","lat":41.12028968100003,"lon":-83.18815267099995,"geom_source":"nps_gis"},"listed_date":"1980-01-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A machine shop and foundry complex at 235 Miami Street in Tiffin, Ohio, with an original two-story brick machine shop erected in 1916 and later assembly shops and an office building across the intersection.","why_significant":"It is one of thirteen buildings and complexes nominated as the most important old industrial concerns in Tiffin. The Hanson firm began making friction clutches in 1914 and went on to build shovels, cranes and heavy trailers, including what the nomination calls the first full-revolving gasoline-powered shovel in the United States. The complex illustrates the city's shift from a small agricultural trading center to a specialized industrial center.","narrative":"Hanson Machinery Company occupies a machine shop, foundry and assembly complex at Wall and Miami Streets in Tiffin, Ohio. Brothers Milton B. and Clifford O. Hanson began making friction clutches in April 1914 in a small downtown shop at Court and Jefferson Streets, with three employees. In spring 1916 they bought land at Wall and Miami Streets and built the two-story common-bond brick machine shop and foundry, which has parapets, a concrete foundation and 21 bays across the front. Four assembly buildings followed in 1927, 1929, 1942 and 1944, along with an office building. The firm built a full-revolving shovel in 1924 and, according to the nomination, the first gasoline-powered full-revolving three-eighths cubic yard shovel in the United States. It also introduced solid-tire and pneumatic-tired heavy-duty trailers in 1928 and 1930. The complex is listed as part of a group of Tiffin industrial buildings that together show the city's economic development.","period_of_significance":null,"architect_builder":null,"architectural_style":null,"criteria":[],"status_note":"The company still operates at the site; the nomination says no original machinery remains except possibly a milling machine dating from 1920, which has not been proven.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:12.624419-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/80003219.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71986156","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/seneca-county/hanson-machinery-company-80003219/"}