{"nrhp_refnum":"09001161","name":"SMUD Headquarters Building","other_names":[],"category":"building","location":{"address":"6301 S. St.","address_restricted":false,"city":"Sacramento","county":"Sacramento County","state":"CA","lat":38.55424292250004,"lon":-121.43265219008998,"geom_source":"nps_gis"},"listed_date":"2010-01-04","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A four-story, roughly 166,000 square foot office building at 6301 S Street in Sacramento, California, designed by Dreyfuss and Blackford and built in the late 1950s as headquarters for the Sacramento Municipal Utility District (SMUD).","why_significant":"The nomination argues the building is an exceptional local example of International/Miesian Modernism, with steel frame construction, glass curtain walls, a plinth base and an integrated landscape. It also cites innovative energy-efficient aluminum sun louvers and a Wayne Thiebaud glass mosaic mural. The building retains a very high level of integrity.","narrative":"This four-story office building on S Street in Sacramento was designed by the local firm Dreyfuss and Blackford and completed around 1959 as headquarters for the Sacramento Municipal Utility District. Two rectangular wings are joined by a central mechanical tower, with a steel frame, glass curtain walls and a recessed base wrapped in an Italian glass tile mosaic by artist Wayne Thiebaud titled Water City. Custom extruded aluminum louvers on the south front shade the glass and control glare and heat, reflecting the utility's interest in energy efficiency. The building sits on a landscaped campus with a sunken patio and mature plantings designed by Oakland landscape architects. It was listed for its architecture as an exceptional local example of Miesian International Style Modernism. The architects drew on buildings they saw in Chicago, Detroit and New York. Exterior changes have been minor, and the building still serves its original function.","period_of_significance":"1959","architect_builder":"Dreyfuss and Blackford, Sacramento, California","architectural_style":"Modern Movement: International Style","criteria":["C"],"status_note":"Continues to serve its original function as the utility district's headquarters, with no major exterior alterations; some interior changes such as the former demonstration kitchen and lobby ceiling.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:29.741089-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/09001161.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/09001161/f59c06c142-800.webp","url_1600":"https://nationalhistoricalregister.com/media/09001161/f59c06c142-1600.webp","licence":"CC BY-SA 3.0","author":"Asilvero","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:SMUD_Headquarters_Building_Front_Facade_Panorama.jpg\" rel=\"noopener\">Asilvero</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:SMUD_Headquarters_Building_Front_Facade_Panorama.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123860668","wikipedia":"https://en.wikipedia.org/wiki/SMUD_Headquarters_Building","wikidata":"https://www.wikidata.org/wiki/Q7391394"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/sacramento-county/smud-headquarters-building-09001161/"}