{"nrhp_refnum":"12000515","name":"Clingmans Dome Observation Tower","other_names":[],"category":"structure","location":{"address":"Terminus of Clingmans Dome Rd.","address_restricted":false,"city":"Bryson City","county":"Swain County","state":"NC","lat":35.564763749000065,"lon":-83.49832247899997,"geom_source":"nps_gis"},"listed_date":"2012-08-15","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Entertainment/Recreation","Politics/Government"],"significance_levels":["state"],"summary":{"what_it_is":"A reinforced-concrete observation tower at the summit of Clingmans Dome, the highest point in Great Smoky Mountains National Park, straddling the North Carolina/Tennessee line near Bryson City. It was built in 1959 and designed by the Bebb and Olson architectural firm.","why_significant":"The tower is argued to be nationally significant under Criterion A as an example of the National Park Service's Mission 66 program, in which only nine towers were built. Under Criterion C it represents mid-century Park Service Modern architecture. Its design also served as the model for two later Mission 66 towers, at Look Rock and Shark Valley.","narrative":"Clingmans Dome Observation Tower crowns the highest peak in Great Smoky Mountains National Park, straddling the North Carolina and Tennessee border. Completed in 1959 to a design by the Bebb and Olson firm, it is built mainly of reinforced concrete. A 375-foot spiral ramp, rising at about a 12 percent grade like the trail leading to it, carries visitors 45 feet up to a circular platform beneath a flat canopy. Seven concrete columns of varying height support the ramp, and a large hollow central column carries the platform. Stone walls and a flagstone terrace mark the entrance. The tower reflects the National Park Service's Mission 66 program, a ten-year effort to modernize park facilities for growing crowds, and it is one of only nine towers built under that program. Its design drew criticism from conservation groups, and it later served as the pattern for towers at Look Rock and Shark Valley.","period_of_significance":"1959-1966","architect_builder":"Bebb and Olson Architectural Firm","architectural_style":"Modern Movement; Park Service Modern","criteria":["A","C"],"status_note":"The form describes the tower as still in use as a visitor destination, with later finishes beginning to delaminate in places and a badly rusted storage-room door.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:57:54.402905-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/51/7223/47722351/content/electronic-records/rg-079/NPS_NC/12000515.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/12000515/8fa78112c3-800.webp","url_1600":"https://nationalhistoricalregister.com/media/12000515/8fa78112c3-1600.webp","licence":"CC BY-SA 4.0","author":"Famartin","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:2017-05-17_13_37_28_View_from_near_the_bottom_of_the_ramp_to_the_Clingmans_Dome_Observation_Tower_in_Great_Smoky_Mountains_National_Park,_on_the_border_of_Sevier_County,_Tennessee_and_Swain_County,_North_Carolina.jpg\" rel=\"noopener\">Famartin</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:2017-05-17_13_37_28_View_from_near_the_bottom_of_the_ramp_to_the_Clingmans_Dome_Observation_Tower_in_Great_Smoky_Mountains_National_Park,_on_the_border_of_Sevier_County,_Tennessee_and_Swain_County,_North_Carolina.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/47722351","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q65582396"},"indexable":true,"url":"https://nationalhistoricalregister.com/north-carolina/swain-county/clingmans-dome-observation-tower-12000515/"}