BLUE EARTH COUNTY, Minn. (WREX) — In southern Minnesota, the gradual damage happening to the structure of the Rapidan Dam has become one of the most popular viewed videos on social media. The dam, ...

The Rapidan Dam near Mankato is no longer in danger of “imminent failure” but the 114-year-old structure on the Blue Earth River was still battered by the raging water that slammed debris and sediment ...

Water in the Blue Earth River flows around the the Rapidan Dam southwest of Mankato, Minn., Monday, threatening the integrity of the dam as well as a house on the west side of the dam.

An information board at the Rapidan Dam letters on the edge of the Blue Earth River as flood waters erode the sediment below.

Geophysical methodologies have become indispensable in evaluating the structural integrity and long-term performance of dams. These non-invasive techniques, such as Electrical Resistivity Tomography ...