1968 Map of Illco

About this map

Illco serves as the primary point of interest in this high-plains landscape, situated along the Chicago and Northwestern rail line and Thirtythree Mile Road. This map documents a high-desert environment defined by its drainage systems, most notably where the North Fork, Middle Fork, and main channel of Casper Creek converge in the southwest corner. The prevalence of intermittent water features like Smith Draw and North Fork Twentymile Draw reveals a geography dictated by seasonal runoff and sparse reliable water sources such as the lone Spring near the center of the sheet. Survey markers like XBM 5324 and BM 5315 provide exact elevations for genealogists and surveyors looking to locate historical property boundaries or homestead sites near the old railroad right-of-way.