The City of Joliet Police Department issued the following announcement on April 18.
@IDOT_Illinois announced all below bridges require work throughout April & May & will be CLOSED. Plan for alternate routes & expect delays:
Jackson St Bridge = April 20-24
Cass St Bridge = May 11-15
Jefferson St Bridge = May 18-22
McDonough St Bridge = May 26-29
Original source can be found here.
Source: The City of Joliet Police Department