Waccamaw River Crests Without Overtopping Pond 2
MONCKS CORNER, S.C. – NOAA reports the Waccamaw River has crested in Conway. It did not overtop Pond 2, which still holds about 200,000 tons of ash.
Santee Cooper took several steps to prepare for the flooding, including filling both ponds with water to stabilize the dikes, drawing baseline water and sediment samples from the ponds and river, placing floating containment boom throughout the ponds, and installing an AquaDam and silt fencing on top of Pond 2. The AquaDam added more than 30 inches in height to the Pond 2 dike and prevented the river from overtopping the dike.
At its crest, the river remained at least a foot below the top of the AquaDam. The AquaDam is continuing to function as it should, and Santee Cooper is still monitoring it and both dikes. The river flowed overtop Santee Cooper’s Grainger plant Pond 1, which was empty of stored ash, on Friday.
Santee Cooper will continue to sample water and sediment quality in the ponds and in the river while it dewaters the ponds, keeping pace with the river receding. Sampling results so far are all within permitted requirements.