Hi Bob, Vicki, and Rosie. You have your bridge clearances correct. Once you reach Joliet, IL the mast can come back up and stay up. Ironic that you are currently in Oxford. We left Milwaukee in September 2005 on our GB46CL and our boat is currently in Oxford as well. We're sort of "stuck" in the loop as our boat has been out there since 2007. We're reluctant (at least at this time) to bring her back to the Great Lakes so we've based her out of Oxford for the past two years. This year's plans call for a 2 month cruise up to Maine and return. By chance you're at Oxford Yacht Agency.???? Frank Arndorfer 414.254.1668 262.628.3575 (fax) fmja10@yahoo.com