{"nrhp_refnum":"79000874","name":"Sinnissippi Site","other_names":["Illinois Archaeological Survey No. Wt-4"],"category":"site","location":{"address":null,"address_restricted":true,"city":"Sterling","county":"Whiteside County","state":"IL","lat":41.797222,"lon":-89.659722,"geom_source":"wikidata"},"listed_date":"1979-05-14","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Prehistoric"],"significance_levels":["local"],"summary":null,"photo":{"url_800":"https://nationalhistoricalregister.com/media/79000874/aa73558328-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79000874/aa73558328-1600.webp","licence":"CC BY 2.5","author":"IvoShandor","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Sterling_Il_Sinnissippi_Site5.jpg\" rel=\"noopener\">IvoShandor</a>, <a href=\"https://creativecommons.org/licenses/by/2.5\" rel=\"license noopener\">CC BY 2.5</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Sterling_Il_Sinnissippi_Site5.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28894286","wikipedia":"https://en.wikipedia.org/wiki/Sinnissippi_Mounds","wikidata":"https://www.wikidata.org/wiki/Q7524732"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/whiteside-county/sinnissippi-site-79000874/"}