{"nrhp_refnum":"94001420","name":"March Field Historic District","other_names":["March Air Force Base"],"category":"district","location":{"address":"Eschscholtzia Ave., March Air Force Base","address_restricted":false,"city":"Riverside","county":"Riverside County","state":"CA","lat":33.89840546950006,"lon":-117.2548751754864,"geom_source":"nps_gis"},"listed_date":"1994-12-06","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Military"],"significance_levels":["state"],"summary":{"what_it_is":"A 158-acre military historic district at March Air Force Base near Riverside, Riverside County, California, containing 228 buildings, structures and objects built mostly between 1928 and 1943, plus one building from 1918.","why_significant":"The district preserves the formal, triangular 1928 plan of March Field, shaped by City Beautiful ideas and a unified Mission Revival architectural program. Its buildings include one of the largest collections of hollow-wall concrete construction, a method linked to consulting architect Myron Hunt. The plan was developed with input from Quartermaster Corps designers and city planner George B. Ford.","narrative":"Within March Air Force Base near Riverside, California, a triangular 158-acre core preserves the layout and buildings of March Field as rebuilt from 1928. Of 228 resources, 199 contribute, including hangars, barracks, a hospital, headquarters, industrial buildings and many officers' quarters, nearly all dating from 1928 to 1943. One wood-frame building survives from the 1918 base. The plan separates the base into seven functional sectors arranged along strong axes, with Graeber Street as the working axis and Baucom Avenue as the ceremonial one. It reflects City Beautiful and early city planning ideas, and George B. Ford advised on its final layout. Buildings share a Mission Revival look, with stucco surfaces, clay tile roofs and arcades. Many use hollow-wall concrete construction, associated with architect Myron Hunt, who served as principal consulting designer. Mature landscaping adds to the setting, and the district remains in military use with very good integrity.","period_of_significance":null,"architect_builder":"Myron Hunt (principal consulting designer); Quartermaster Corps architects; George B. Ford (advisory city planner)","architectural_style":"Mission Revival","criteria":[],"status_note":"Still used for defense and air facility functions; integrity is described as very good, with 199 of 228 resources contributing.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:27.574474-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/94001420.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":null,"wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q58337034"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/riverside-county/march-field-historic-district-94001420/"}