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Chicago Chapter Meeting
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When: February 21, 2017
Where: Rodity's
222 S Halsted
Chicago, IL 
United States
Contact: Glenn Wittman

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February 2017 AEG Dinner Meeting - Tuesday, February 21, 2017

LOCATION: Rodity’s, 222 South Halsted Street, Chicago, IL 60661, (312) 454-0800

PROGRAM TOPIC: Three-Dimensional Mapping of Glacial and Post-Glacial Deposits in Chicagoland

SPEAKER: Brandon Curry, Senior Geologist, Illinois State Geological Survey

WHEN: Tuesday, February 21, 2017, Cocktails @ 5:15 pm, Dinner @ 6:15 pm, Presentation following dinner

COST: $40 Members, $45 Non-Members, $15 Students and Professors

RSVP: By email By 5 PM Monday, February 20, 2017

The Illinois State Geological Survey (ISGS) is recognized as a national leader of three-dimensional mapping of surficial geology deposits. Within the last ten years, we released digital products at a 1:100,000 scape for Kane, Lane, and McHenry Counties, with projected completion of a digital 3D map of Will County next year. Today, critical land-use decisions are made based on the results of groundwater flow models based upon our 3D geologic maps. The next 3D mapping project is Cook County, starting from the southern end. This year, we began to verify locations and input data from water wells and engineering geology reports into our statewide database. We are in the process of revitalizing an “engineering geology” database that includes measurements of moisture content, blow counts, and unconfined compressive strength, and where available, Atterberg limits and other parameters. Jean Bogner recently provided us with reports done in the late 1970s for the Central Chicago Area Transit (CCAT) project (a proposed subway beneath the Loop and environs). The ISGS already possesses a vast database for studies done at Fermilab near Batavia, Illinois, that provides an excellent baseline on the predictability of parameters such as Atterberg limit data with particle size distribution data and moisture content. We are imploring consulting geologists and government agencies (IDOT, Chicago Transit Authority, Chicago Sanitary District, Army Corps, etc.) to
provide us with data that we can input to our system to maximize the quality and utility of a northeastern Illinois/Cook County database.

We are exploring the possibility for adding proprietary data (with secure access for the donors) that can be used to “train” our models, but not be made publically available. The end product 3D geologic layers and data from borings done with public funding will be, of course, made available to all. A potential use of our database would be to enhance the value, integrity, and efficiency of Geotechnical Baseline Reports.

Our talk will review the structure and work flow involved in enhancing our engineering geology database. We will review a case study of entering work done for the CCAT project, and present the interpretation of the surficial geologic units that underlie the Loop based on the collective insights of Jean Bogner and ISGS.


  • Introduction of new officers
  • Treasurer’s report
  • Old business (e.g. approval of reimbursement for Purdue University student transportation)
  • New business (e.g. report on member preferences for meetings)
  • Changing the Chicago Chapter’s business year to match the national AEG business year
  • Other matters which might be brought before the membership
  • Barney Markunas reminds the members that Illinois PG licenses are in renewal through the end of
    March. Don’t forget to send in the renewal to avoid a late fee.

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