 The Rapidan Dam near Mankato is still stable despite severe flooding at the Blue Earth River earlier this summer. County Engineer and Public Works Director Brian Tilges says once flood levels lowered there, they were able to make some preliminary observations on the Rapidan Dam structure. Based on some control points on the dam, the survey company was able to shoot about half of those control points and determine that there was no movement during the flood or after the flood, no notable movement.