2023 Dam Emergency
In March 2023, a sinkhole was discovered near the downstream base of Arkabutla Dam, caused by the loss of sand and soil from beneath the dam. If left untreated this could have resulted in a collapse of the dam.
To ensure public safety, a flood warning was issued as a precaution and top USACE dam safety engineers from around the country were brought in to quickly assess the severity of the situation and direct emergency repairs.
Ongoing Safety Measures
To reduce risk, temporary safety measures have been put in place:
• The lake’s water level has been lowered to 204 feet to reduce pressure on the dam.
• Deep underground wells have been added to lower the water pressure under the dam.
• Additional monitoring devices have been installed to track water pressure inside the dam.
• The dam’s monitoring system has been upgraded to better track conditions.
The next phase of work will include filling underground spaces with grout to strengthen the dam’s foundation. These temporary fixes will help keep the dam safe while a long-term repair plan is developed.
USACE is studying the best way to make permanent improvements to the dam, with a final decision expected by summer 2025. The current plan involves replacing the dam’s aging water-release outlet with a new, modern version. Because this is a large and complex project, construction could take up to 10 years to fully complete.
Public Safety and Recreation Updates:
Public safety is our top priority, and USACE staff are continuously monitoring the dam for any changes.
• Highway 51 Landing is currently the only open boat ramp providing access to the Coldwater River above Arkabutla Dam.
• Camping and other recreational areas around Arkabutla Lake remain open, except for certain day-use areas downstream of the dam.
• Areas below the dam will stay closed for safety reasons until construction is complete.
USACE will continue to provide updates as work progresses. We appreciate your patience and support as we work to ensure Arkabutla Dam remains safe and can deliver benefits for generations to come.