Rising waters from the Blue Earth River have caused significant damage near a failing southern Minnesota dam, with officials now expressing concern about the safety of the nearby County Road 9 Bridge. The heavy rainfall and flooding in the Midwest have led to a rapid rise in water levels, putting the structural integrity of the dam and bridge at risk. The 40-year-old bridge, essential for daily commutes for local residents, is in danger of collapsing if weather conditions worsen.
Ryan Thilges, Blue Earth County’s public works director, emphasized the challenges posed by the unpredictable forces of nature. Standing near the Rapidan Dam outside Mankato alongside Minnesota Governor Tim Walz and other officials, Thilges highlighted the potential for partial or complete failure of the bridge due to the ongoing threat.
The floodwaters have reshaped the area surrounding the dam, causing significant damage to infrastructure and making it unsafe for officials to conduct a thorough inspection. The rapidly flowing river has eroded sediment around the bridge’s supporting piers, raising concerns about stability. Efforts to clear debris, including a mass of fallen trees, have been complicated by safety risks for workers.
The historic Rapidan Dam, built in 1910 to generate electricity, has faced multiple flooding incidents in recent years, leading to concerns about its deteriorating condition. Despite being listed in poor condition in a 2023 assessment, the dam’s potential removal is being considered. A federal disaster declaration has been issued for Blue Earth County to assist with recovery efforts, but the complex landscape poses challenges for rebuilding and restoration projects.
Thilges acknowledged the difficulties in finding solutions that do not further jeopardize the dam or bridge and underscored the need for a reprieve from relentless natural forces. The ongoing situation serves as a stark reminder of the delicate balance between human intervention and the uncontrollable forces of nature in safeguarding critical infrastructure.
