The bridge does not raise automatically to marine traffic. The height of the bridge from water fluctuates depending on the level of the Rainy River. If a boat needs to have the bridge raised to pass under the bridge, a bridge tender in Chicago must be called, who in turn relays information to CN workers onsite. The bridge is supposed to be raised in a timely fashion. Due to the increased traffic on the bridge, marine traffic often has to wait significant amounts of time. The port of entry is currently the busiest US Customs rail of port of entry in the US.
How high is this bridge from the water and does it raise aotumatically to marine traffic??