Central Station Land Surveys

Gremley and Biedermann were contracted to prepare the "Central Station Subdivision" which required a large amount of field work to complete. With the use of field notes from our vast library of historic documents and current field analysis, we were able to determine the boundary line configurations. With the uses of state of the art equipment G & B were able to gather the information in a quick and accurate manner.

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.