{"nrhp_refnum":"93000910","name":"US Naval Ordnance Testing Facility Control Tower","other_names":[],"category":"building","location":{"address":"SW corner of S. Anderson Blvd. and Flake Ave.","address_restricted":false,"city":"Topsail Beach","county":"Pender County","state":"NC","lat":34.366209113000025,"lon":-77.62877579199994,"geom_source":"nps_gis"},"listed_date":"1993-09-14","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Military"],"significance_levels":["national"],"summary":{"what_it_is":"A three-level reinforced concrete control tower at Topsail Beach, Pender County, North Carolina, designed in 1946 by the Kellex Corporation for the Navy Bureau of Ordnance and built by George and Lynch of Wilmington, Delaware.","why_significant":"It served as command headquarters for \"Operation Bumblebee,\" the secret 1946-1948 ramjet missile testing program run by the Navy and the Johns Hopkins Applied Physics Laboratory. It is one of the surviving resources of an early postwar missile effort that preceded later programs at sites such as White Sands, Cape Canaveral and Inyokern. It qualified under Criterion A despite being less than fifty years old.","narrative":"Built in 1946 on Topsail Island, this sixteen-by-sixteen-foot reinforced concrete tower rises thirty feet and is filled with concrete block walls. The Kellex Corporation designed it for the Navy Bureau of Ordnance, and George and Lynch of Wilmington, Delaware, erected it. It was the command post for \"Operation Bumblebee,\" where military personnel and Johns Hopkins Applied Physics Laboratory scientists directed secret ramjet missile tests from 1946 to 1948. The tower sat midway between the assembly building and the launch site along the beach. After the Navy left in 1948, the land was subdivided and the town of Topsail Beach grew around the former base. In 1957 the tower was bought and converted to a seasonal home, with its original open roof deck replaced by a flat roof and its interior stairs partly retained. It was listed for its link to early American missile development, despite being under fifty years old at the time.","period_of_significance":"1946-1948","architect_builder":"Kellex Corporation/George & Lynch","architectural_style":"No style","criteria":["A"],"status_note":"Converted to a seasonal residence after purchase in 1957; the open observation deck was replaced with a wide-eave flat roof and new windows were added.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:57:49.719381-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/27/7183/47718327/content/electronic-records/rg-079/NPS_NC/93000910.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/47718327","wikipedia":"https://en.wikipedia.org/wiki/US_Naval_Ordnance_Testing_Facility_Control_Tower","wikidata":"https://www.wikidata.org/wiki/Q23023259"},"indexable":true,"url":"https://nationalhistoricalregister.com/north-carolina/pender-county/us-naval-ordnance-testing-facility-control-tower-93000910/"}