Chicago White Sox Land Surveys

James Schaeffer and Schimming was assigned the task of locating certain structural elements for the extension of safety netting.

Here we see a survey done of lot one in block 3 in Ashland addition to Chicago, being a re subdivision of the overall Chicago subdivision. This survey seems to also require a vertical component in the Chicago City Vertical Datum system. I am sure I will cover more on CCD, or Chicago City Datum, in later posts as they arise.