{"nrhp_refnum":"09000296","name":"Route 66 South of Lake Springfield","other_names":["Old Route 66","Olde Carriage Way"],"category":"structure","location":{"address":"Olde Rt. 66/ Olde Carriage Way","address_restricted":false,"city":"Springfield","county":"Sangamon County","state":"IL","lat":39.67247070900004,"lon":-89.62326871299996,"geom_source":"nps_gis"},"listed_date":"2009-05-12","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Education","Transportation"],"significance_levels":["local"],"summary":{"what_it_is":"A 1.3-mile segment of former U.S. Route 66, now signed as Old Route 66 and Olde Carriage Way, south of Lake Springfield near Springfield, Sangamon County, Illinois. The two-lane concrete road was built about 1921-1922 and designated Route 66 in 1926.","why_significant":"The segment is significant for its association with Route 66, a major route from Chicago to Santa Monica, and as an example of two-lane rural highway construction of 1921-1930. It was bypassed when the road was rerouted in 1930 to make way for Lake Springfield. Its Portland cement surface and surrounding farmland remain much as they were in the period of significance.","narrative":"This 1.3-mile stretch of old Route 66 lies south of Lake Springfield, between East Lake Shore Drive and New City Road near Springfield, Illinois. Built around 1921-1922 as part of State Route 4, the Chicago to St. Louis corridor, it was designated Route 66 in 1926. The roadway is Portland cement poured about 16 feet wide and 6 inches deep, with two 8-foot lanes and narrow shoulders. It is signed today as Old Route 66 and Olde Carriage Way. In 1930 Route 66 was moved west because a bond vote funded Lake Springfield, which would cover the original alignment; the lake was flooded by 1935. This segment survived south of the lake. It was recognized for its link to Route 66 and as an example of rural two-lane highway building from 1921 to 1930. A grain silo and open farmland nearby preserve the rural setting. The road is the only resource counted.","period_of_significance":"1926-1930","architect_builder":"Unknown","architectural_style":"Other / two-lane highway","criteria":["A","C"],"status_note":"Road is in good condition with some seams in fair condition; the southern 0.2 mile has been repaved. It remains in transportation use.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:37.616865-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/36/8914/28891436/content/electronic-records/rg-079/NPS_IL/09000296.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28891436","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/sangamon-county/route-66-south-of-lake-springfield-09000296/"}