Highway 17 Bridge at Iron Bridge: Notice of Periodic Closures Temporary Road Closure The Municipality has received notice from Toronto Zenith, the contractor undertaking the rehabilitation work on the Highway 17 bridge, spanning the Mississagi River in Iron Bridge, that it will be periodically closed for approximately 15 minute intervals to all traffic commencing at 10:00 p.m. (22:00 hrs.) each evening beginning Tuesday, August 27th, to 6:00 a.m. the morning of Friday, August 30th. OPP will be on site to monitor traffic flow and safety. Should circumstances require that this work be postponed re-scheduling dates will be posted on this website.