Streator's population peaked at about 17,000 residents in 1960 and has since declined. Many of the original downtown buildings have been demolished, but few have been replaced. Another reason for static growth in Streator is its distance from any major Interstate Highway. When the federal highway system started in the 1950s and 1960s no interstate was built near the city. Streator is from Interstate 55, from Interstate 80 and Interstate 39. 2007 Comprehensive plan Streator and the North Central Illinois Council of Governments (NCICG) finalized the Streator Comprehensive Plan in February 2007. The plan if approved is a roadmap for civic, transportation, housing, commercial and recreational improvements in the city through 2027. Geography Streator is located at (41.1208668, −88.8353520). As of 2021, Streator has a total area of , of which (or 99.1%) is land and (or 0.9%) is water. Topography and geology Streator lies within the Vermilion River/Illinois River Basin Assessment Area (VRAA) defined by the watershed of the Vermilion River, a major tributary to the Illinois River in Central Illinois, an area of mostly flat prairie. The topography of the basin is a complex collection of buried valleys, lowlands and uplands carved by repeated episodes of continental glaciation. Underneath the topsoil, the region's bedrock contains vast amounts of coal. About 68% of Illinois has coal-bearing strata of the Pennsylvanian geologic period. According to the Illinois State Geological Survey, 211 billion tons of bituminous coal are estimated to lie under the surface, having a total heating value greater than the estimated oil deposits in the Arabian Peninsula. However, this coal has a high sulfur content, which causes acid rain. Streator's coal mining history closely parallels Illinois', with a great push in coal production from 1866 until the 1920s, when many of the mines closed. The low-sulfur coal of the Powder River Basin and the growing demands for oil caused a decline in demand for Streator's high-sulfur coal. The St. Peter sandstone is an Ordovician formation in the Chazyan stage of the Champlainian series. This layer runs east–west from Illinois to South Dakota. The stone consists of 99.44% silica, which is used for the manufacture of glass. Its purity is especially important to glassmakers. Streator, which lies within the St. Peter sandstone formation, has mined this mineral since the late 19th century for use in its glass manufacturing industries. Climate Streator has a continental climate, influenced by the Great Lakes.