Wrigley Field Land Surveys
When the Cubs needed more space in the bleachers, they came to PLCS. When the Chicago Sun Times wanted to know how far Glenallen Hill's home run really was, they called PLCS. Over the years PLCS has been providing service to the home of the Cubs. Specifically, Gremley and Biedermann have prepared topographic surveys while James Schaeffer and Schimming provided construction control for the parks restoration.

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.