December 4, 2018 - 5:00pm to 7:00pm

Structural Design Challenges of an Urban Interchange

Located in the center of downtown Chicago, the Jane Byrne Interchange consists of the removal and replacement of twenty bridge structures, rehabilitation to three existing structures, and the construction of approximately fifty retaining walls as part of the overall improvement of the I-90/94 and I-290/Congress Parkway interchange. 

Due to its constrained location, ideal design parameters were not always possible. This presentation will discuss the many challenges present while designing the proposed bridges and retaining walls in this urban setting including: vertical and horizontal constraints, extremely poor soil conditions, underground ductbanks, main drain storm sewer, abandoned and active tunnels and other utilities, and conflicts with existing bridge substructure elements and the existing CTA Blue Line tunnels, among others. This presentation will also discuss some of the proposed solutions used to overcome these challenging conditions including the use of shallow depth steel plate girders, the constraints of galvanizing and metalizing of steel beams, and design considerations for adjacentdrilled shaft retaining walls.

Attendees will earn 1.0 hour of Continuing Education Credit. CE certificates will be emailed after the event.

About the Speaker


Will Colletti

Will Colletti, P.E., S.E. is a structural bridge engineer at TranSystems Corporation in Chicago, Illinois. Will has an MS and BS in Structural Engineering from the University of Illinois at Urbana-Champaign. He has six years of experience designing straight and curved bridges for IDOT and the Illinois Tollway.



Cliff Dwellers Club
200 S. Michigan Ave, 22nd Floor
Chicago, IL


  • Caesar Salad
  • Chicken Piccata
  • Carrot Cake

The evening begins with a cocktail hour at 5:15 pm. Dinner will be served at 6 pm, and the presentation will start shortly thereafter.  


The registration fee is $45 for members/$65 for non-members through November 21st. After November 21st, prices increase to $55 and $75, respectively.

Cancellation Policy:

If you make a reservation and cannot attend, please cancel before Friday, November 30th.  If you do not cancel by that time, please send a colleague in your place, as you will be charged.


Photo Courtesy of TransSystems



Irsilia Colletti ( HNTB Corporation )
George Krupa ( Lakeshore Engineering, LLC )
Michelle Ryland ( Klein & Hoffman )
Alma Shkurti ( Middough, Inc. )
Tony Shkurti ( HNTB Corporation )
Dennis Penepacker
Greg Hatlestad ( Civiltech Engineering, Inc. )
Jon Vana ( Civiltech Engineering, Inc. )
John Horner ( Larsa )
William Colletti ( TranSystems )
Deborah Zroka ( Milhouse Engineering & Construction, Inc. )
Nezar Abraham ( Rimkus Consulting Group, Inc )
Mark Bendok ( Alfred Benesch & Company )
David Nauheimer ( Sargent & Lundy LLC )
Josh Brickman ( Magnusson Klemencic Associates )