Coast Guard reopens portion of Tennessee River to commercial traffic after bridge collapse. The Coast Guard has reopened a portion of the Tennessee River, Saturday, after a section of the Eggner Ferry Bridge collapsed following an allision with a vessel.The U. S. Army Corps of Engineers has deemed the navigable channel safe for commercial transit after completing a channel survey Friday evening and finding no obstructions or debris. The safety zone from mile marker 41 to mile marker 43 on either side of the bridge continues to be in effect. At approximately 7 a.m., Saturday, the Coast Guard began allowing commercial vessels to move through the safety zone. Vessels are instructed to transit at the slowest safe speed to ensure minimal wake.