{"nrhp_refnum":"79003196","name":"Riegel Covered Bridge No. 6","other_names":[],"category":"structure","location":{"address":"SR 312","address_restricted":false,"city":"Catawissa","county":"Columbia County","state":"PA","lat":40.91227109300007,"lon":-76.51338767099998,"geom_source":"nps_gis"},"listed_date":"1979-11-29","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Engineering","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"The Riegel Covered Bridge No. 6 is a covered wooden truss bridge near Catawissa in Columbia County, Pennsylvania, measuring 107.25 feet long with a roadway width of 14.9 feet. Its builder is given as Jacob Kostenbauder; the construction date is not stated in the text provided.","why_significant":"The nomination argues the bridge is significant for its engineering, as a Burr truss arch with an unusual single arch on the inner side of each wall truss, and for its role in transportation, linking farms, saw mills and grist mills during the growth of local towns. It also notes that covered bridges have not been built in Columbia County for about half a century, which makes the design and engineering of these structures unique there.","narrative":"Riegel Covered Bridge No. 6 is a wooden covered bridge near Catawissa in Columbia County, Pennsylvania, built by Jacob Kostenbauder. It measures 107.25 feet long, with a roadway 14.9 feet wide and 11 feet of clearance. It is a Burr truss arch with five diagonal braces on either side of a central king post, and a single arch on the inner side of each wall truss, a feature described as very unusual. The roof is tarred metal panels over wooden rafters and ribbing. Because the deck is trapezoidal, the portals are unique: one post sits flush with the portal while the other is set several feet inward, with awninged windows at either end of the shortened wall. The side walls are board and batten, and the deck has horizontal flooring with two runways. One abutment combines natural rock outcrop and concrete, and the other retains its original stone and mortar. The bridge is significant for its engineering and for its part in carrying travel between farms, saw mills and grist mills as local towns grew.","period_of_significance":null,"architect_builder":"Jacob Kostenbauder (builder)","architectural_style":"Burr Truss Arch","criteria":["C"],"status_note":null,"vacant_flag":null,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:32.612095-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79003196.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79003196/05dc2a1b4c-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79003196/05dc2a1b4c-1600.webp","licence":"Public domain","author":"According to this, \"The photos were produced by the United States Department of Agriculture, Agricultural Adjustment Administration (now known as the Farm Service Agency).\" The website gives the following information for the full photo this is cropped from: \"Flight date: 10/04/1938; Scale: 1:20000; County ID: aqr; Roll ID: 18 Photo #: 20; Index: 9 of 14; Flying complete: 07/1939; Produced by: USDA Agricultural Adjustment Administration Northeast Division; Contractor: Woltz Studios, Inc. Aerial Surveys Des Moines, IA\"","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Riegel_Covered_Bridge_No._6_Aerial_View_1938.png\" rel=\"noopener\">According to this, &quot;The photos were produced by the United States Department of Agriculture, Agricultural Adjustment Administration (now known as the Farm Service Agency).&quot; The website gives the following information for the full photo this is cropped from: &quot;Flight date: 10/04/1938; Scale: 1:20000; County ID: aqr; Roll ID: 18 Photo #: 20; Index: 9 of 14; Flying complete: 07/1939; Produced by: USDA Agricultural Adjustment Administration Northeast Division; Contractor: Woltz Studios, Inc. Aerial Surveys Des Moines, IA&quot;</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Riegel_Covered_Bridge_No._6_Aerial_View_1938.png"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71992806","wikipedia":"https://en.wikipedia.org/wiki/Riegel_Covered_Bridge_No._6","wikidata":"https://www.wikidata.org/wiki/Q7333087"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/columbia-county/riegel-covered-bridge-no-6-79003196/"}