 And fast-moving water from the Blue Earth River continues to hamper efforts by crews to inspect the County Road 9 bridge just south of the Rapidan Dam near Mankato. After a partial failure of the dam in late June, county officials turned their attention to the bridge. A Blue Earth County spokesperson says the speed of the river's flow makes it too dangerous to get a boat into the water to inspect all of the bridge's piers. The bridge remains closed to pedestrian and vehicle traffic.