{"nrhp_refnum":"99000098","name":"Helmick Mill Covered Bridge","other_names":["Island Run Covered Bridge"],"category":"structure","location":{"address":"Township Rd. 269 over Island Run","address_restricted":false,"city":"Malta","county":"Morgan County","state":"OH","lat":39.719838553000045,"lon":-81.94210097799998,"geom_source":"nps_gis"},"listed_date":"1999-02-05","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering"],"significance_levels":["local"],"summary":{"what_it_is":"A single-span wooden multiple kingpost truss covered bridge carrying Township Road 269 over Island Run in Deerfield Township, about seven miles northwest of Malta, Morgan County, Ohio. It was built in 1867 on cut sandstone abutments.","why_significant":"The nomination argues it exemplifies the multiple kingpost (Buckingham) truss, the most common wooden truss design in Ohio. It is one of five covered bridges left in Morgan County and one of only three still on their original sites. It is also the only documented surviving bridge by builder Samuel Price in Ohio.","narrative":"Spanning Island Run in a remote part of Morgan County, Ohio, this covered bridge was built in 1867 by contractor Samuel Price after county commissioners sought a new crossing, probably because an earlier bridge had washed out. The 74-foot structure uses a nine-panel multiple kingpost truss with an X brace in the center panel, cut sandstone abutments, corrugated metal siding and roof, and projecting portals. The bridge takes its name from a nearby sawmill and grist mill operated by the Helmick family, both now gone. Still open to traffic, it carries about 40 vehicles a day. It was listed because it represents the multiple kingpost design, widely known in Ohio as the Buckingham truss. Only a small fraction of Ohio's timber truss bridges survive, and this is one of three Morgan County covered bridges remaining on their original sites. It is also the only documented surviving Price bridge in Ohio.","period_of_significance":"1867 to 1948","architect_builder":"Samuel Price built stone abutments and wooden superstructures","architectural_style":"Other: Covered Bridge (multiple kingpost truss)","criteria":["C"],"status_note":"Still open to traffic, carrying about 40 vehicles per day; steel mid-span supports were added about 1965 and two downstream windows in 1997.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:52:07.568128-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/99000098.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/99000098/7a397cc4e2-800.webp","url_1600":"https://nationalhistoricalregister.com/media/99000098/7a397cc4e2-1600.webp","licence":"Public domain","author":"Nyttend","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Helmick_Mill_Covered_Bridge.jpg\" rel=\"noopener\">Nyttend</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Helmick_Mill_Covered_Bridge.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71990631","wikipedia":"https://en.wikipedia.org/wiki/Helmick_Mill_Covered_Bridge","wikidata":"https://www.wikidata.org/wiki/Q58904055"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/morgan-county/helmick-mill-covered-bridge-99000098/"}