{"nrhp_refnum":"07000117","name":"Illinois State Police Office, Pontiac","other_names":[],"category":"building","location":{"address":"15551 Old US 66","address_restricted":false,"city":"Pontiac","county":"Livingston County","state":"IL","lat":40.853021709000075,"lon":-88.65567429299995,"geom_source":"nps_gis"},"listed_date":"2007-03-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Transportation","Politics/Government"],"significance_levels":["state"],"summary":{"what_it_is":"A one-story Art Moderne brick police office built in 1941 on Old U.S. Route 66, about two miles southwest of Pontiac, Livingston County, Illinois. The nominated property includes the building and an original steel flagpole.","why_significant":"The nomination argues the building is significant under Criterion A for government and transportation. It served as headquarters for State Police District 6 until 2003 and handled traffic and safety along the heavily traveled U.S. Route 66 corridor. It retains a high degree of integrity in its original design, materials, location and setting.","narrative":"Built in 1941 beside Old U.S. Route 66 southwest of Pontiac, this one-story Illinois State Police office is a tan wire-brick building with Art Moderne influences. A curved corner wall of structural glass block holds the main entrance, and glazed tile trim and a flat gravel-and-tar roof complete the exterior. One wing housed administration and the other a garage. Inside, terrazzo floors, plaster walls, built-in cupboards, a squad room with a raised platform, a locker room and an original oil boiler remain. An original steel flagpole stands in front. The office served as headquarters of State Police District 6 until 2003, patrolling a corridor that by the 1940s carried more traffic than any other long-distance highway in Illinois. Route 66 earned a reputation for accidents, which made police presence there important. The building was listed for its role in state government and highway transportation, with a period of significance from 1941 to 1956. It is currently vacant.","period_of_significance":"1941-1956","architect_builder":"State of Illinois, Department of Public Works and Buildings, Division of Architecture and Engineering","architectural_style":"Modern Movement: Art Moderne","criteria":["A"],"status_note":"Current function is listed as vacant/not in use; the building served as District 6 headquarters until 2003.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:37.438303-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/71/8934/28893471/content/electronic-records/rg-079/NPS_IL/07000117.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/07000117/9af35e1c87-800.webp","url_1600":"https://nationalhistoricalregister.com/media/07000117/9af35e1c87-1600.webp","licence":"CC BY-SA 3.0","author":"IvoShandor","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Pontiac_Illinois_State_Police_Office10.JPG\" rel=\"noopener\">IvoShandor</a>, <a href=\"http://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:Pontiac_Illinois_State_Police_Office10.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28893471","wikipedia":"https://en.wikipedia.org/wiki/Illinois_State_Police_Office_(Pontiac)","wikidata":"https://www.wikidata.org/wiki/Q5999761"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/livingston-county/illinois-state-police-office-pontiac-07000117/"}