The pond iced over during the night due to the cold weather. Notice how the smaller 6' AquaDam® abuts into the larger one and creates a water-tight seal using a coupling collar. The white AquaDam® was placed to support the connection during dewatering.  

The 6" pumps have been removed due to their unmanageable size. They were replaced by three 3" pumps. You can clearly see the difference between the 12' and 8' AquaDams® in this picture. This represents a step-down effect.

AquaDams® in a side-by-side support configuration.