Attached please find an invitation for a webinar on March 21, 2019 entitled “GRS-IBS: Solutions to Bridge Construction Challenges”. Promotion of GRS-IBS foundations has been an FHWA Every Day Counts Initiative since about 2010.
You are welcome to attend, and please be aware the Department issued BLRS CL 2011-05 on March 31, 2011 to address guidelines for the use of this design. Link at http://www.idot.illinois.gov/
Assets/uploads/files/ Transportation-System/ Directories/Bulletins-&- Circulars/Bureau-of-Local- Roads-and-Streets/Circular- Letters/Informational/CL2011- 05.pdf. We are aware of one GRS-IBS foundation constructed in Illinois, a grade separation pedestrian structure over a roadway completed in 2012. We understand there was a cost overrun on that foundation, but expect technology may have improved since then. We are not aware at this time of any other “GRS-IBS” structures being constructed in Illinois.
Local Policy and Technology Engineer
Illinois Department of Transportation