1979 Map of Crystal Lake

About this map

Crystal Lake and the surrounding prairie wetlands of Plankinton and Eureka townships define this corner of Aurora County during the late 1970s. The landscape is characterized by a high density of conservation land, including the National Waterfowl Production Area and the Crystal Lake State Public Shooting Area, reflecting the region's importance for migratory birds and local sportsmen. Infrastructure is anchored by the Chicago Milwaukee St Paul and Pacific railroad corridor, which runs parallel to Interstate 90. Isolated features such as a Flowing Well and several other marked wells indicate the agricultural reliance on groundwater across these rural sections. The township of Pleasant Lake sits adjacent to the primary water bodies, documenting a period of established land management and transportation development.